Merge "Add private gpu and total dmabuf size to SystemMemory atom" into sc-dev am: 20f9ba61 am: 12c09d1f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13575045

Change-Id: I42bf5d3ef208ee1f54b294c059abce7eb25e1467