Set USB group for /dev/usb_accessory

Change-Id: I17db8d9bb1bf6336979e9b7bce62306d0d7a79d2
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/rootdir/ueventd.rc b/rootdir/ueventd.rc
index d343bd4..356de46 100644
--- a/rootdir/ueventd.rc
+++ b/rootdir/ueventd.rc
@@ -69,6 +69,7 @@
 /dev/qmi2                 0640   radio      radio
 /dev/bus/usb/*            0660   root       usb
 /dev/mtp_usb              0660   root       mtp
+/dev/usb_accessory        0660   root       usb
 
 # CDMA radio interface MUX
 /dev/ts0710mux*           0640   radio      radio