FileSystemPermissionTest: Add /data/img

http://androidforums.com/elite-all-things-root/586938-root-exploit-easier-rooting-without-having-flash-whole-firmware.html

(cherry picked from commit 730a002f8f0bb8bc519f9b5b0cee24f15a44550e)

Change-Id: Ic2dbd97f20fddd9e4c57bb18a0e9ef64d160355b
diff --git a/tests/tests/permission/src/android/permission/cts/FileSystemPermissionTest.java b/tests/tests/permission/src/android/permission/cts/FileSystemPermissionTest.java
index 9d89598..f5ae100 100644
--- a/tests/tests/permission/src/android/permission/cts/FileSystemPermissionTest.java
+++ b/tests/tests/permission/src/android/permission/cts/FileSystemPermissionTest.java
@@ -271,6 +271,7 @@
                     "/data/gpscfg",
                     "/data/hwvefs",
                     "/data/htcfs",
+                    "/data/img",
                     "/data/install",
                     "/data/internal-device",
                     "/data/internal-device/DCIM",