Merge "HDMICEC: handle hdmi_control help command" into main am: 3f35361d1f am: 64a67498b1

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3073583

Change-Id: I07688849865d34a317d729db7fab8f37b9c70dd2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>