Merge "composer: fix missed error handling for setReadbackBuffer" into rvc-d1-dev am: 9b73aca68e

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/qcom/sm7250/display/+/12085172

Change-Id: I7abb48fa75ca766e55972fe177cedbebe4251e49