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

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

Change-Id: Ib179b94bbd400cd01cc12de0a10e1cb93580c7b3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>