Merge "NotificationPanelViewController: separate DEBUG flag for drawable" into tm-dev am: cbad872980 am: 81c5dfc798 am: 0052f0d06e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18586451

Change-Id: I7cbaf65d2989322fe1143e85c851e7beff40104a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>