Merge "Update bouncer delay (behind flag) from 250ms -> 500ms" into udc-dev am: 2c1e760d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23086559



Change-Id: Ia2a8c1be79d691f24ccb906a9825ffeb686824c3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>