tilapia: chown and chmod core_lock_{count,period} sysfs files

Change-Id: I6713a1bed0e17f58ccc28c45751271b8591f964b
Signed-off-by: Iliyan Malchev <malchev@google.com>
tilapia: emulate sdcard using 4 threads

This overrides the default of 2 threads.

Change-Id: I8693043c1f1dce27c6606aab31f57176d870a759
Signed-off-by: Iliyan Malchev <malchev@google.com>
Merge branch 'android-5.0.2_r1' into HEAD