Merge "Expose Handler APIs as @TestApi" into main am: af34323431

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3404741

Change-Id: I04894c3ec348f76ffaf78211cee30364c79b3e36
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>