Make TelecomSystemTest compatible with code coverage

Creates a few implementations of interfaces to spy on to avoid
mysterious exceptions resulting from interactions between Mockito and
Emma.

Change-Id: Ie32b1bb101811471722f6e48aa4c5a75f364575c
diff --git a/tests/Android.mk b/tests/Android.mk
index a802768..317bfe3 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -39,6 +39,9 @@
     --auto-add-overlay \
     --extra-packages com.android.server.telecom
 
+LOCAL_JACK_ENABLED := disabled
+LOCAL_PROGUARD_ENABLED := disabled
+
 LOCAL_PACKAGE_NAME := TelecomUnitTests
 LOCAL_CERTIFICATE := platform