vendor: add sdcam priv app permissions

Change-Id: I883402e54b61b278998dd9840a567932d2e7fee9
diff --git a/prebuilt/etc/permissions/privapp-permissions-omni.xml b/prebuilt/etc/permissions/privapp-permissions-omni.xml
index ebbd6a0..5b56d4b 100644
--- a/prebuilt/etc/permissions/privapp-permissions-omni.xml
+++ b/prebuilt/etc/permissions/privapp-permissions-omni.xml
@@ -71,4 +71,9 @@
         <permission name="android.permission.REAL_GET_TASKS"/>
     </privapp-permissions>
 
+    <privapp-permissions package="org.omnirom.snap">
+        <permission name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
+        <permission name="android.permission.WRITE_MEDIA_STORAGE"/>
+    </privapp-permissions>
+
 </permissions>