Merge "Memtrack HAL: Report global total GPU-private memory" into sc-dev am: 78fb95c57f am: 85889014b5

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

Change-Id: Ica667d99c49825e6483e4408b880189d2b728ff7