Associate MANAGE_EXTERNAL_STORAGE with external_storage gid

Test: m
Bug: 144914977
Change-Id: I3966701af00e07842a474e7e7fceb7db0fe62273
diff --git a/data/etc/platform.xml b/data/etc/platform.xml
index 0541db1..da50550 100644
--- a/data/etc/platform.xml
+++ b/data/etc/platform.xml
@@ -60,6 +60,10 @@
         <group gid="log" />
     </permission>
 
+    <permission name="android.permission.MANAGE_EXTERNAL_STORAGE" >
+        <group gid="external_storage" />
+    </permission>
+
     <permission name="android.permission.ACCESS_MTP" >
         <group gid="mtp" />
     </permission>