codec2: fix to encode smpte2094-40 for gralloc4 metadata am: 3f3d1ace

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/18589713



Change-Id: I41982b91ecbdac8447fa2c6e6ad2b071a178a637
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>