fix(android/engine): Add RECEIVER_EXPORTED flag for broadcast receiver

[darcywong00]

Fixes Sentry crash and follows #10393 which updates the Android targetSDKVersion to 34.

Per Android Developer guide about apps targeting Android 14
https://developer.android.com/about/versions/14/behavior-changes-14#runtime-receivers-exported

Apps and services that target Android 14 and use context-registered receivers are required to specify a flag to indicate whether or not the receiver should be exported to all other apps on the device: either RECEIVER_EXPORTED or RECEIVER_NOT_EXPORTED

User Testing

Setup - Install the PR build of Keyman for Android on Android 14.0 (SDK 34) device / emulator

• TEST_KEYMAN - Verifies Keyman startup

1. Launch Keyman for Android and verify app doesn't crash
2. Dismiss the "Get Started" menu
3. From Keyman settings, install a Keyman keyboard from keyman.com
4. Verify Keyman keyboard installs (Disregard OSK rotation issues as those are tracked on a separate PR)

[keymanapp-test-bot]

User Test Results

Test specification and instructions

• ✅ TEST_KEYMAN (PASSED): Tested with the attached PR build (Keyman 17.0.249-alpha-test-10463) in the Android 12 / API 31 emulator and here is my observation : 1. Opened the Keyman app without getting any crash. 2. Dismissed the "Get Started" menu. 2. Installed 'khmer_angkor' keyboard from Settings / Install a Keyman Keyboard from keyman.com. 3. Verified that the keyboard installed successfully and appeared on the Keyman home page. 4. Verified with Android 13 / Samsung Galaxy A23 mobile device and it is working as expected. (notes)

Test Artifacts

• Android
  • Keyman for Android apk
  • FirstVoices for Android 16.0 apk
  • FirstVoices Keyboards for Android apk
  • KeyboardHarness apk
  • Keyman for Android 16.0 apk
  • KMSample1 apk
  • KMSample2 apk

[bharanidharanj]

Test Results

• TEST_KEYMAN (PASSED): Tested with the attached PR build (Keyman 17.0.249-alpha-test-10463) in the Android 12 / API 31 emulator and here is my observation : 1. Opened the Keyman app without getting any crash. 2. Dismissed the "Get Started" menu. 2. Installed 'khmer_angkor' keyboard from Settings / Install a Keyman Keyboard from keyman.com. 3. Verified that the keyboard installed successfully and appeared on the Keyman home page. 4. Verified with Android 13 / Samsung Galaxy A23 mobile device and it is working as expected.

  

[keyman-server]

Changes in this pull request will be available for download in Keyman version 17.0.250-alpha