Merge "Fix null pointer risk on shouldSleepActivities." into main am: 30c3601a1a am: 181f82ec51 am: adfa33b0c8

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2842897

Change-Id: I1d64d1dad6ed247f97764835f6b1760582c67cc7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>