Merge "AChoreographer: Avoid potential NULL dereference" into rvc-dev am: 01ab4a277f am: a857e79e38

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/11441477

Change-Id: I2f2d89e2c9e31ba9fc3db3bbc4451f4acbb22302