Merge "Add atom for general external storage access stats" into rvc-dev am: b1951ee2 am: f62d71d5 am: 04a1c4b7 am: 15e95723

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11894164

Change-Id: I216fa03f45eb44f90ac8b2a8d9e0c09c6dc0f54d