goldfish-opengl: use RGBA for YCBCR_420_888 am: 18f51fad47 am: 21cc9783b5 am: cec703ad45

Original change: https://googleplex-android-review.googlesource.com/c/device/generic/goldfish-opengl/+/10726530

Change-Id: Ia33757b883fe9e59b64ecb19bec64775fbe58aac