Merge "Introduce a system feature annotation processor" into main am: 389bf1a8a1 am: 5d992e24a7

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3368823

Change-Id: Ia7a15534f051b352424ad8cfc482b9636af86f11
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>