FP2-1101:[ST_2][CTS]Test failed - android.provider.cts.MediaStore_FilesTest-- testAccess.

Add read and write sdcard permissions for gallery .

Change-Id: I60182885c62c59995a2f933efc93ee4d2f2a1eb3
diff --git a/Android.mk b/Android.mk
index 3d5663e..dce6367 100644
--- a/Android.mk
+++ b/Android.mk
@@ -29,6 +29,8 @@
 
 LOCAL_PACKAGE_NAME := Gallery2
 
+LOCAL_CERTIFICATE := platform
+
 LOCAL_OVERRIDES_PACKAGES := Gallery Gallery3D GalleryNew3D
 
 LOCAL_SDK_VERSION := current