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

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

Change-Id: I3a2b01b9d8885c71a5cb906cfa6005a98c7f2575
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>