Replace "mts" with "mts-tethering".

Bug: 203466102
Test: build locally and verified contents
Change-Id: I7cccb54c0ad1a3bd8da0bcb7ad6474aa1e734299
diff --git a/tests/common/Android.bp b/tests/common/Android.bp
index 9b136d5..c4c72c8 100644
--- a/tests/common/Android.bp
+++ b/tests/common/Android.bp
@@ -66,7 +66,7 @@
     min_sdk_version: "30",
     // TODO: change to 31 as soon as it is available
     target_sdk_version: "30",
-    test_suites: ["general-tests", "mts"],
+    test_suites: ["general-tests", "mts-tethering"],
     defaults: [
         "framework-connectivity-test-defaults",
         "FrameworksNetTests-jni-defaults",