Add adbd_test to mts.

Bug: http://b/137798163
Test: mts-tradefed run mts-adbd
Change-Id: I875f224bbcd7b1f81365fffdd8de8d2df4e87c84
diff --git a/adb/Android.bp b/adb/Android.bp
index 7c5e3ea..2a56f0f 100644
--- a/adb/Android.bp
+++ b/adb/Android.bp
@@ -651,7 +651,7 @@
         "libmdnssd",
         "libselinux",
     ],
-    test_suites: ["device-tests"],
+    test_suites: ["device-tests", "mts"],
     require_root: true,
 }