 - Introduce 'standard' and 'legacy' product flavors - see the README for details.

 - Fix a bug that caused a crash when exporting MMS messages without ["display names"](https://developer.android.com/reference/android/provider/ContactsContract.ContactsColumns#DISPLAY_NAME) - by farfromrefug (issue #230 / PR #231)).

 - Fix other bugs.

 - Tamil translation - by TamilNeram (தமிழ் நேரம்).

 - Update Italian and Polish translations.

 - Bump both 'targetSdkVersion' and 'compileSdk' to 35.

 - Update Gradle, Android Gradle Plugin (AGP), and dependencies.
