[automerger skipped] libhwc2.1: Fix incorrect DRM_FORMAT for RGBA_FP16 am: 3ec426448d am: 61965f4d1c -s ours

am skip reason: Merged-In I2be3c58e9ec3d80e031c3ad24a5592df637a2346 with SHA-1 8f0a2bf300 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/google/graphics/common/+/25650513

Change-Id: Idc66dd05b1d4068d07dd4541cdf66f7063ecbee8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>