Add new permission android.permission.ACCESS_USB to allow access to USB devices

Change-Id: Ib3dd573a5ef3950d20b21251fe7a3efad56b5c1f
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/data/etc/platform.xml b/data/etc/platform.xml
index 7322e6c..0e5df8c 100644
--- a/data/etc/platform.xml
+++ b/data/etc/platform.xml
@@ -58,6 +58,10 @@
         <group gid="sdcard_rw" />
     </permission>
 
+    <permission name="android.permission.ACCESS_USB" >
+        <group gid="usb" />
+    </permission>
+
     <!-- The group that /cache belongs to, linked to the permission
          set on the applications that can access /cache -->
     <permission name="android.permission.ACCESS_CACHE_FILESYSTEM" >