Merge "Add system_server to readtracefs group" am: 3f73570646 am: 1802c2eb34 am: f3c80521cf am: 298efb93e7

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1914167

Change-Id: I789acb585330d394dc85f770449d35c5f93958f7