bramble: move touch sysfs nodes to system group

Change the group of the touch sysfs node to allow sensor HAL
to collect touch information.

Bug: 154675013
Test: push init.bramble.rc into device and reboot to check
the node does change to system group.

Signed-off-by: davidycchen <davidycchen@google.com>
Change-Id: Iddd757cae63dfd5a6e54bbb04dba81407e814c39
1 file changed