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

* commit '4b7f0b27a267e5e10894bbf438dec15e534e4cc4':
  ANRdaemon: add README and a bash script to easily get trace.

Change-Id: I0ea20dd173cfaef70df4d07672810ca233fcb5f2