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

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

Change-Id: Icde9f353685830d6edf0cdec13aee4fcb56163e9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>