renderControl_enc: (2/3) Pass mapping size to rcMapGpaToBufferHandle().

This changes adds guest-side support to new renderControl method
  rcMapGpaToBufferHandle2(uint32_t bufferHandle,
                          uint64_t gpa,
                          uint64_t size);

For details see aosp/1427447.

Change-Id: Ia5d03459c0ead91d192fec24b2b0af7dc8123338
7 files changed