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

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

Change-Id: Ie07232a0c610815e1bbb6c1b07975efa7ea739ac
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>