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

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

Change-Id: Icb810473ad7c6635a906439ddca1a861e5a8376d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>