Merge "Reserves memory for external buffers" into rvc-dev am: 5f86b51408 am: 79de2730fe am: 0f16de253f am: 5e5a64a1a3

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/11925286

Change-Id: I8d3832c938c66442ac5af54c5b338995e345d950