Dexmaker: Downgrade Errorprone error

Until fixed upstream, downgrade an error to a warning in the tests.

Bug: 72076216
Test: m javac-check RUN_ERROR_PRONE=true
Change-Id: Idd20cbb861f68eb4d7e3bed893420460f2b6f754
diff --git a/dexmaker-tests/Android.mk b/dexmaker-tests/Android.mk
index ff8b050..e4950d2 100644
--- a/dexmaker-tests/Android.mk
+++ b/dexmaker-tests/Android.mk
@@ -27,6 +27,7 @@
 LOCAL_SDK_VERSION := 17
 LOCAL_SRC_FILES := $(call all-java-files-under, src/androidTest/java)
 LOCAL_STATIC_JAVA_LIBRARIES := dexmaker android-support-test
+LOCAL_ERROR_PRONE_FLAGS := -Xep:JUnit4TestNotRun:WARN
 include $(BUILD_STATIC_JAVA_LIBRARY)
 
 # Build a test APK