Migrate to AndroidX library

[benoitletondor]

This PR contains the migration of the whole codebase to the new AndroidX WatchFace library: https://developer.android.com/reference/kotlin/androidx/wear/watchface/package-summary

TODO

• [x] Migrate Android 12 layout
• [x] Use the new API to exchange data between companion app and phone

Tests

• [x] Tests on WearOS 2
• [x] Tests on WearOS 3
• [x] Test phone battery sync
• [x] Test premium status sync
• [x] Test watch->phone interaction (rating/companion opening/donate)
• Galaxy Watch specific:
  • [x] Test HR widget
  • [x] Test buggy calendar widget
  • [ ] Test buggy tap on Samsung Health daily activity complication
  • [x] Test battery comparison workaround for frozen complications
  • [ ] Weather working as expected
  • [ ] Complications not displayed when watch face starting