Generate .toc for android_stubs_current.jar

This should be landed before we merge the main change, which
defines define-jar-to-toc-rule.

https://android-review.googlesource.com/#/c/181833/

Bug: 24597504
Change-Id: Icc3394690fb7949cfb89eff951ce3c394d273205

build/build_android_stubs.mk

@@ -52,4 +52,6 @@ $(full_target): $(stub_timestamp) $(framework_res_package)
 	$(hide) jar -u0f $@ -C $(PRIVATE_CLASS_INTERMEDIATES_DIR) resources.arsc
 
 $(jack_lib) : $(full_target) $(JILL_JAR) $(JACK)
-	$(transform-jar-to-jack)
+	$(transform-jar-to-jack)
+
+$(call define-jar-to-toc-rule, $(full_target))