Merge "Suppress "UnflaggedApi" lint for @TestApi." into main am: cdf207b2b6 am: 714c778e41

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2813073

Change-Id: I1a28a89c4bbfc7da49a0d83a69fe999400ac2e61
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>