Merge "Remove USE_APP_PANELS flag" into udc-qpr-dev am: 40383d7977 am: 114c036144

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24161136

Change-Id: I2654cfe8d0a01b3d850dc2c1c3291bdd88baeb76
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>