[RELEASE] React Native SDK v2.7.1

[sbarrio]

What does this PR do?

Prepares v2.7.1 release which includes several important fixes.

What's Changed

• RUM-9753 Fix crash when calling eventEmitter.sendEvent with invalid bridge after Fast Refresh by @cdn34dd in [RUM-9753] Fix crash when calling eventEmitter.sendEvent with invalid bridge after Fast Refresh #864
• RUM-9801 Fix main thread initialization warning for RCTDatadogWebViewManager by @cdn34dd in [RUM-9801] Fix main thread initialization warning for RCTDatadogWebViewManager #866
• RUM-9771 Fix rum sessionIdListener for new architecture by @cdn34dd in [RUM-9771] Fix rum sessionIdListener for new architecture #865
• [Fix] Externalize setting of minSdkVersion on sdk Android packages by @sbarrio in [Fix] Externalize setting of minSdkVersion on sdk Android packages #873 and [Fix] Set minSdkVersion on core gradle.properties to 21 #875
• RUM-9773 Fix - Missing js_refresh_rate Metrics After Upgrading to 2.6.4 by @sbarrio in [RUM-9773] Fix - Missing js_refresh_rate Metrics After Upgrading to 2.6.4 #872

Full Changelog: 2.7.0...sbarrio/release-v2.7.1

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)
• If this PR is auto-generated, please make sure also to manually update the code related to the change

[datadog-datadog-prod-us1]

Datadog Report

Branch report: sbarrio/release-v2.7.1
Commit report: 50058af
Test service: dd-sdk-reactnative

✅ 0 Failed, 669 Passed, 1 Skipped, 4.05s Total Time