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

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

Change-Id: Ibec4c59d84e32b8f8ba7e8beceb85fb491a8d341
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>