Merge "Expand @FlaggedApi(FLAG) constants in API signature files" into main am: 779ebfb62b am: 0275f893c2 am: 48567b752e

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2759286

Change-Id: If6070e8cf24a17ac8099db113f887b5a4368746d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>