Android platform 12.0.0 release 19
Merge cherrypicks of ['googleplex-android-review.googlesource.com/18029563', 'googleplex-android-review.googlesource.com/21161445', 'googleplex-android-review.googlesource.com/21261266', 'googleplex-android-review.googlesource.com/21238189', 'googleplex-android-review.googlesource.com/21373663', 'googleplex-android-review.googlesource.com/21318377', 'googleplex-android-review.googlesource.com/21655734', 'googleplex-android-review.googlesource.com/21611508', 'googleplex-android-review.googlesource.com/21740199', 'googleplex-android-review.googlesource.com/21960922', 'googleplex-android-review.googlesource.com/21574889'] into sc-platform-release.

Change-Id: I7bf66bbdb295d57a0d4c2729ef6751affa946f07