MMS API: build file change to add MmsService

b/14095333

Change-Id: I573dc16569fada9032c6d3f532a9b10f8ea75d2f
diff --git a/target/product/core.mk b/target/product/core.mk
index 5fe5754..875d08c 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -50,6 +50,7 @@
     SharedStorageBackup \
     Telecomm \
     TeleService \
-    VpnDialogs
+    VpnDialogs \
+    MmsService
 
 $(call inherit-product, $(SRC_TARGET_DIR)/product/core_base.mk)