Run jetifier against prebuilts directly rather than classes.jar

It turns out that the resource files inside the .aar files may
need rewriting too

Bug: 72552006
Test: Set LOCAL_JETIFIED_ENABLED for a prebuilt and built it
      See also one of the patches after this one and its topic
      which contains a sample for testing
Change-Id: I89d0b4aa8d5c6ae3abc2344dd05222cf9672d5c0
(cherry picked from commit ed170e72961dab855848bc58527923cbeba551b5)
diff --git a/core/java.mk b/core/java.mk
index 3eb9086..9147849 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -358,13 +358,7 @@
 full_classes_jarjar_jar := $(full_classes_processed_jar)
 endif
 
-#######################################
-LOCAL_JETIFIER_INPUT_FILE := $(full_classes_jarjar_jar)
-
-include $(BUILD_SYSTEM)/jetifier.mk
-#######################################
-
-$(eval $(call copy-one-file,$(LOCAL_JETIFIER_OUTPUT_FILE),$(full_classes_jar)))
+$(eval $(call copy-one-file,$(full_classes_jarjar_jar),$(full_classes_jar)))
 
 #######################################
 LOCAL_FULL_CLASSES_PRE_JACOCO_JAR := $(full_classes_jar)