Add thermal stats permissions for clearing

Bug: 227199213
Test: echo 2 > /dev/thermal/cdev-by-name/dc_icl/cur_state
   Verify logcat | grep pixelstats. Ensure there are no errors
Change-Id: I72f3f9d5fd39c18bba8d4bdb023c7b9eecf6a691
1 file changed