Merge "Memtrack HAL: Report global total GPU-private memory" into sc-dev am: 78fb95c5 am: d55a8e2a am: 6458a116

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/15266040

Change-Id: I5a4eb3d7b8f98caf4c3a43d3ffc0723d669d5871