Merge "aconfig: add @UnsupportedAppUsage to methods in generated flags" into main am: 057a3dd4

Original change: https://android-review.googlesource.com/c/platform/build/+/2777061



Change-Id: I92c7d78242b6e68bfa1cc70ed44885ad567071b1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>