Use Taskbar window for phones (only works on gesture nav) with flag am: 7db37b3d

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/18801667



Change-Id: Icb4ed4c35ec434dacb70ef1c9cd7b6b5bfccaf70
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>