Merge "ActivityManager: Include Private Dirty Pages in Meminfo" into main am: dff1d0ff15 am: 536524c058

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2853847

Change-Id: I35a7d4e0c1d0cdf300eacb827f4f0ef55bf29d95
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>