Enable networking tests to be included in partial MTS files as well as
full mts.

Test: built locally and verified contents.
Bug: 170318013
Change-Id: Idea798841c067002d7b1f47da73a34052a8ab32c
diff --git a/tests/cts/tethering/Android.bp b/tests/cts/tethering/Android.bp
index 824c874..fa52e9b 100644
--- a/tests/cts/tethering/Android.bp
+++ b/tests/cts/tethering/Android.bp
@@ -52,7 +52,7 @@
     test_suites: [
         "cts",
         "general-tests",
-        "mts",
+        "mts-tethering",
     ],
 
     // Include both the 32 and 64 bit versions