Merge "Remove the SysUI flag ALLOW_DISMISS_ONGOING" into udc-qpr-dev am: 75e0825a3a am: 9e14552d5f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24109387

Change-Id: I809d169de5e423b04b61e207e8d0715836efb8eb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>