Merge "Track frozen duration in procstats." into udc-qpr-dev am: 3f6427fc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24471278



Change-Id: Iad9221e2777a43536593b5e2cb018de6f6b877b8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>