Merge "gralloc: Change default flexible YUV format to YCrCb_420_SP" into rvc-d1-dev am: 930cbb81e2

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/qcom/sm7250/display/+/11788666

Change-Id: I3782390abef9f4dbc6a9d711ae74d77391355168