Merge "HdmiVideoExtconUEventObserver: handle "DP=1" state" into main am: f761d414df am: 1690f125ec am: c772c1b3be am: 1a15bf65ed

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2630590

Change-Id: Iba1ae100ed7184b39d3c492706b6d7648b702f5d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>