Add mts to build file

Bug: 145232009
Test: mts
Change-Id: I462aa07f6728f714a268f2152d3a9030f9c7bb9a
diff --git a/tests/Android.bp b/tests/Android.bp
index 7a59651..7c51a0d 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -37,6 +37,9 @@
         "truth-prebuilt",
     ],
 
-    test_suites: ["device-tests"],
+    test_suites: [
+        "device-tests",
+        "mts",
+    ],
 
 }