Merge "HDMI: Add Hotplug Detection Signal support" am: be1d5356f7 am: ea18f96966 am: aa78792d1c

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2297079

Change-Id: I36f4276680d3c60f7ebc4ff6ff27c21893fddbf2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>