Avoid JUnit4 collision in android-support-test, mockito-target

Bug: 31072145
Test: make droid checkbuild

Change-Id: I507b476694f88cc960804904feff330e6f9358c4
diff --git a/tests/Android.mk b/tests/Android.mk
index 0b54491..ad153ae 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -24,7 +24,7 @@
 # Do not compress test data file
 LOCAL_AAPT_FLAGS += -0 .txt
 
-LOCAL_STATIC_JAVA_LIBRARIES := android-support-test mockito-target
+LOCAL_STATIC_JAVA_LIBRARIES := android-support-test mockito-target-minus-junit4
 
 # Include all test java files.
 LOCAL_SRC_FILES := $(call all-java-files-under, src)