Merge "Add running apps icons to taskbar for desktop environment." into tm-qpr-dev am: c047fa42

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19459745



Change-Id: I750c97b6c6272995667aaac60f9fe76552e65c69
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>