Replace custom annotation processor handling

Use LOCAL_ANNOTATION_PROCESSORS instead of custom annotation
processor handling.

Test: m -j java
Change-Id: Ib17c40920377a09dde9f09a7f3006dc1ad46f085
diff --git a/Android.mk b/Android.mk
index 013acf9..7250a34 100644
--- a/Android.mk
+++ b/Android.mk
@@ -17,8 +17,7 @@
 
 # Use Dagger2 annotation processor
 # b/25860419: annotation processors must be explicitly specified for grok
-PROCESSOR_LIBRARIES := dagger2-auto-value-host
-PROCESSOR_CLASSES := com.google.auto.value.processor.AutoValueProcessor
-include external/dagger2/java_annotation_processors.mk
+LOCAL_ANNOTATION_PROCESSORS := dagger2-auto-value-host
+LOCAL_ANNOTATION_PROCESSOR_CLASSES := com.google.auto.value.processor.AutoValueProcessor
 
 include $(BUILD_HOST_JAVA_LIBRARY)