Merge "RecentTasks:fix NPE problem to avoid system_server process crash." into...

Merge "RecentTasks:fix NPE problem to avoid system_server process crash." into main am: 3b8ea133 am: dc174914

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3415677



Change-Id: If65551ea42218838b4423fc186e8b9a3068e3f17
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>