Merge "Add null check for testing if change is recent task" into udc-qpr-dev am: da53aded0f am: f7c71b4c98

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23919049

Change-Id: I2ddc04de2cca6d442d51990b6ba00dbaa58c9f74
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>