Android platform 12.1.0 release 19
Merge cherrypicks of ['googleplex-android-review.googlesource.com/20334962', 'googleplex-android-review.googlesource.com/23516859', 'googleplex-android-review.googlesource.com/23475534', 'googleplex-android-review.googlesource.com/23709052', 'googleplex-android-review.googlesource.com/23905843', 'googleplex-android-review.googlesource.com/23883016', 'googleplex-android-review.googlesource.com/23860830'] into sc-v2-platform-release.

Change-Id: If976366d984bc3321f12acb324832bc88ec06842