Copy annotations.zip to out/target/common/obj/PACKAGING/

Test: m out/target/common/obj/PACKAGING/metalava-api-stubs-docs_annotations.zip
Bug: b/78245848
Change-Id: I283e046afb0c6e420d251e9c974835a4ec2fbad4
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 5051ef7..c1c1bb8 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -252,6 +252,7 @@
 LOCAL_SOONG_STATIC_LIBRARY_EXTRA_PACKAGES :=
 LOCAL_DROIDDOC_STUBS_SRCJAR :=
 LOCAL_DROIDDOC_DOC_ZIP :=
+LOCAL_DROIDDOC_ANNOTATIONS_ZIP :=
 # '',true
 LOCAL_SOURCE_FILES_ALL_GENERATED:=
 LOCAL_SRC_FILES:=