Merge "Communicate right error code from DPMS to MP in response to...

Merge "Communicate right error code from DPMS to MP in response to STATUS_HEADLESS_SYSTEM_USER_MODE_NOT_SUPPORTED" into udc-dev am: 5c5306fe

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23130321



Change-Id: I9c2691b725616f5fdd76e327a26bc756952d4bdc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>