fix(android): upgrade toolchain for androidx.core 1.17.0 requirements

Bump AGP to 8.9.1 and compileSdk to 36 so release builds satisfy the
transitive AndroidX metadata checks that were failing checkReleaseAarMetadata.
Update the release workflow to install Android SDK 36 and matching build-tools.

Author: evilguy4000

.github/workflows/release.yml

@@ -85,7 +85,7 @@ jobs:
 
       - uses: android-actions/setup-android@v3
         with:
-          packages: platform-tools platforms;android-35 build-tools;35.0.0
+          packages: platform-tools platforms;android-36 build-tools;36.0.0
 
       - name: Cache Gradle
         uses: actions/cache@v4

frontend/android/build.gradle

@@ -7,7 +7,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:8.7.2'
+        classpath 'com.android.tools.build:gradle:8.9.1'
         classpath 'com.google.gms:google-services:4.4.2'
 
         // NOTE: Do not place your application dependencies here; they belong

frontend/android/variables.gradle

@@ -1,6 +1,6 @@
 ext {
     minSdkVersion = 23
-    compileSdkVersion = 35
+    compileSdkVersion = 36
     targetSdkVersion = 35
     androidxActivityVersion = '1.9.2'
     androidxAppCompatVersion = '1.7.0'