Merge "Remove ANGLE from base_system.mk" into rvc-dev am: ddca499c am: 4763cf42 am: cc461b75 am: 009c0759

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/+/11897778

Change-Id: Ied4677d61e0b77c7032c65c2775ba64e3fa95c61