settings: set correct permissions on su-call

This should probably go directly into the shell library,
but since we pass the full commands to it, it's hard to
rebuild the complete command.
This should fix some logcat errors regarding IO exceptions.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
profiles: improve per-app profile performance

Just improving the performance a little bit for the
service as well as the general UI.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>