Label sysfs node power_mode as sysfs_display.

Label power_mode to sysfs_panel to let it be allowed in dumpstate.

avc log:
08-26 11:59:55.044 14700 14700 W dump_display: type=1400 audit(0.0:25): avc:  denied  { read } for  name="power_mode" dev="sysfs" ino=83218 scontext=u:r:dump_display:s0 tcontext=u:object_r:sysfs:s0 tclass=file permissive=0 bug=b/340722772

Test: ls -Z, adb bugreport.
Flag: EXEMPT bugfix
Bug: 358505990
Change-Id: Ia31964903b62f72237ae18cf07a2cef0138adeea
Signed-off-by: attis <attis@google.com>
1 file changed