Merge "Ignore empty tasks when unfreezing recents list after timeout" into...

Merge "Ignore empty tasks when unfreezing recents list after timeout" into udc-dev am: ebba1751 am: 48fe5f14

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22497407



Change-Id: I901aad6dd2ec3387642cd62c9513c2c7fda8461a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>