Merge "Memtrack HAL: Report global total GPU-private memory" into sc-dev am: 78fb95c57f am: 4e0f02f80a

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

Change-Id: I9c5abd7c276f606888700df0a086c437d1111e3d