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: 2c6ff0cb

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



Change-Id: If39c26c418aa22a773b7267683a45f3272938f43
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>