[automerger skipped] Merge "DO NOT MERGE Add logging for when IOnBackInvokedCallback is null." into tm-qpr-dev am: 31fb807ef2 am: 05fe935512 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22442774

Change-Id: I87344acad8bba4ba6abc2cc5b4cbd8d89aaedc18
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>