Merge "Enabled flag for LOG_DND_STATE_EVENTS." into udc-dev am: 11230c84 am: 4d988b8d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23389999



Change-Id: If3d68ec3b1850c84b2b6d15473f4c59a86ad63c5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>