Add TTS CTS-V tests to cts-verifier.zip

Test: Manual test
Bug: 176275839
Change-Id: Ie051fa74a55205c7eb69164ea6ab241074a13881
diff --git a/apps/CtsVerifier/Android.mk b/apps/CtsVerifier/Android.mk
index ab0d539..083fd9b 100644
--- a/apps/CtsVerifier/Android.mk
+++ b/apps/CtsVerifier/Android.mk
@@ -49,7 +49,9 @@
     CtsPermissionApp \
     CtsForceStopHelper \
     NotificationBot \
-    CrossProfileTestApp
+    CrossProfileTestApp \
+    CtsTtsEngineSelectorTestHelper \
+    CtsTtsEngineSelectorTestHelper2
 
 # Apps to be installed as Instant App using adb install --instant
 pre-installed-instant-app := CtsVerifierInstantApp