Merge "Add drop shadow for HUNs when shade is opened" into tm-qpr-dev am: e87d7509 am: 23dae874

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20468691



Change-Id: I2691fa0da5bfce375d47124e2ea8b8b3339c9a19
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>