am f455c9a2: merge in jb-release history after reset to jb-dev

* commit 'f455c9a2':
  SF could get stuck waiting for vsync when turning the screen off
  libgui: improve some logging and dumping
  libgui: improve some logging and dumping
  Workaround for add_tid_to_cgroup failed to write
  make sure to repaint the screen when screen turns on
  Add sdcard_r group to dumpstate.
  Ensure that /data/anr/traces.txt is world-writable
  displayhardware: fix not obeying ro.sf.lcd_density when specified