Merge "Check null taskInfo for occlude transitions" into udc-dev am:...

Merge "Check null taskInfo for occlude transitions" into udc-dev am: 2d319490 am: 06ffd562 am: 0b4102f7 am: a20ede11

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23154320



Change-Id: Ib1fd5e492bcc43b9a383599cf09c09e8e4657ff4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>