Allow the shell to set USB functions.

Bug: 25596495
Test: svc usb setFunction mtp true
Change-Id: I4472464a1c7ed100cb257dbad83d1d8cfef88fc7
diff --git a/data/etc/privapp-permissions-platform.xml b/data/etc/privapp-permissions-platform.xml
index 039ab1f..5226fe5 100644
--- a/data/etc/privapp-permissions-platform.xml
+++ b/data/etc/privapp-permissions-platform.xml
@@ -264,6 +264,7 @@
         <permission name="android.permission.INTERACT_ACROSS_USERS"/>
         <permission name="android.permission.MANAGE_ACTIVITY_STACKS"/>
         <permission name="android.permission.MANAGE_DEVICE_ADMINS"/>
+        <permission name="android.permission.MANAGE_USB"/>
         <permission name="android.permission.MODIFY_APPWIDGET_BIND_PERMISSIONS"/>
         <permission name="android.permission.MODIFY_PHONE_STATE"/>
         <permission name="android.permission.MOUNT_FORMAT_FILESYSTEMS"/>