Merge "libhwc2.1: reserve DPP_VGRFS2 for the outer display" into udc-dev am: 3772e6fed2

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/google/graphics/gs201/+/21926041

Change-Id: I7fa1e43b7bfcc2892966254110f0b713892add90
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>