Make SMS/MMS providers singletons across users

Share the SMS and MMS logs across all users.
Move the apk to system/priv-app to let PackageManager
allow it to export singleton providers.

Bug: 16681533
Change-Id: I3f41da7c5e099e42ea531ea8b31be42be9a3a24a
diff --git a/Android.mk b/Android.mk
index 5501c1f..7b63072 100644
--- a/Android.mk
+++ b/Android.mk
@@ -3,6 +3,8 @@
 
 LOCAL_MODULE_TAGS := optional
 
+LOCAL_PRIVILEGED_MODULE := true
+
 LOCAL_SRC_FILES := $(call all-subdir-java-files)
 
 LOCAL_PACKAGE_NAME := TelephonyProvider