Merge "Toggle notifications panel via actions shortcut" into udc-dev am: df01fc84

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21547861



Change-Id: Ia0b3971befd8ecf1621dc4cf91aa372f203018cd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>