Android platform 12.0.0 release 20
Merge cherrypicks of ['googleplex-android-review.googlesource.com/16341971', 'googleplex-android-review.googlesource.com/18054679', 'googleplex-android-review.googlesource.com/21872485', 'googleplex-android-review.googlesource.com/22290645'] into sc-platform-release.

Change-Id: I88942fe255a1782145d053bf8c089ce0ced265f3