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

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

Change-Id: Ia3cd14996f74a7b8f0a0b64402c7c1381bed9c56