Merge "[aapt2] Generate @FlaggedApi annotations" into main am: 5f951b7f6c am: 5fe48781b3

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2783692

Change-Id: If64634b45f2bf9994dc11f94cc1f5654f470e035
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>