ANRdaemon: add README and a bash script to easily get trace. am: 9e90477a67 am: 4b7f0b27a2
am: 27879586ff

* commit '27879586fff26d5ac1864f57bf441a39f8ab9315':
  ANRdaemon: add README and a bash script to easily get trace.

Change-Id: Ib39181c0fd9901619a8a300f8a358e8918471e5b