kokoro/ndk-build: Add scripts to test multiple ABIS

Set up ABIs:
 armeabi-v7a
 arm64-v8a
 x86_64

After this, a Google-internal config change will be required
to enable these flows.

Bug: crbug.com/285134522

Author: dneto0

kokoro/ndk-build/arm64-v8a/build.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+# Copyright 2026 The Amber Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Fail on any error.
+set -e
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd )"
+
+exec $SCRIPT_DIR/../build.sh arm64-v8a

kokoro/ndk-build/arm64-v8a/continuous.cfg

@@ -0,0 +1,15 @@
+# Copyright 2026 The Amber Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+build_file: "amber/kokoro/ndk-build/arm64-v8a/build.sh"

kokoro/ndk-build/arm64-v8a/presubmit.cfg

@@ -0,0 +1,15 @@
+# Copyright 2026 The Amber Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+build_file: "amber/kokoro/ndk-build/arm64-v8a/build.sh"

kokoro/ndk-build/armeabi-v7a/build.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+# Copyright 2026 The Amber Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Fail on any error.
+set -e
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd )"
+
+exec $SCRIPT_DIR/../build.sh armeabi-v7a

kokoro/ndk-build/armeabi-v7a/continuous.cfg

@@ -0,0 +1,15 @@
+# Copyright 2026 The Amber Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+build_file: "amber/kokoro/ndk-build/armeabi-v7a/build.sh"

kokoro/ndk-build/armeabi-v7a/presubmit.cfg

@@ -0,0 +1,15 @@
+# Copyright 2026 The Amber Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+build_file: "amber/kokoro/ndk-build/armeabi-v7a/build.sh"

kokoro/ndk-build/build-docker.sh

@@ -47,6 +47,7 @@ echo "$(date): Starting ndk-build for android_test ..."
   NDK_PROJECT_PATH=.          \
   "NDK_LIBS_OUT=$(pwd)/libs"  \
   "NDK_APP_OUT=$(pwd)/app"    \
+  "APP_ABI=$ANDROID_ABI"      \
   -j8
 
 echo "$(date): ndk-build for android_test completed."
@@ -57,5 +58,6 @@ echo "$(date): Starting ndk-build for samples ..."
   NDK_PROJECT_PATH=.          \
   "NDK_LIBS_OUT=$(pwd)/libs"  \
   "NDK_APP_OUT=$(pwd)/app"    \
+  "APP_ABI=$ANDROID_ABI"      \
   -j8
 echo "$(date): ndk-build for samples completed."

kokoro/ndk-build/build.sh

@@ -16,6 +16,8 @@
 # Fail on any error.
 set -e
 
+ANDROID_ABI=${1:-arm64-v8a}
+
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd )"
 ROOT_DIR="$( cd "${SCRIPT_DIR}/../.." >/dev/null 2>&1 && pwd )"
 
@@ -34,6 +36,7 @@ docker run --rm -i \
   --env ROOT_DIR=${ROOT_DIR} \
   --env KOKORO_ARTIFACTS_DIR="${KOKORO_ARTIFACTS_DIR}" \
   --env BUILD_SHA="${BUILD_SHA}" \
+  --env ANDROID_ABI="${ANDROID_ABI}" \
   --entrypoint "${SCRIPT_DIR}/build-docker.sh" \
   us-east4-docker.pkg.dev/shaderc-build/radial-docker/ubuntu-24.04-amd64/cpp-builder
 RESULT=$?

kokoro/ndk-build/x86_64/build.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+# Copyright 2026 The Amber Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Fail on any error.
+set -e
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd )"
+
+exec $SCRIPT_DIR/../build.sh x86_64

kokoro/ndk-build/x86_64/continuous.cfg

@@ -0,0 +1,15 @@
+# Copyright 2026 The Amber Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+build_file: "amber/kokoro/ndk-build/x86_64/build.sh"