Add build target for generating navtree json with all inherited members.

Change-Id: I142e848b5288d92e14445025705ea7596e635b6b

Android.mk

@@ -1236,6 +1236,31 @@ LOCAL_DROIDDOC_CUSTOM_TEMPLATE_DIR:=build/tools/droiddoc/templates-sdk
 
 include $(BUILD_DROIDDOC)
 
+# ==== generates full navtree for resolving @links in ds postprocessing ====
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:=$(framework_docs_LOCAL_SRC_FILES)
+LOCAL_INTERMEDIATE_SOURCES:=$(framework_docs_LOCAL_INTERMEDIATE_SOURCES)
+LOCAL_STATIC_JAVA_LIBRARIES:=$(framework_docs_LOCAL_STATIC_JAVA_LIBRARIES)
+LOCAL_JAVA_LIBRARIES:=$(framework_docs_LOCAL_JAVA_LIBRARIES)
+LOCAL_MODULE_CLASS:=$(framework_docs_LOCAL_MODULE_CLASS)
+LOCAL_DROIDDOC_SOURCE_PATH:=$(framework_docs_LOCAL_DROIDDOC_SOURCE_PATH)
+LOCAL_ADDITIONAL_JAVA_DIR:=$(framework_docs_LOCAL_ADDITIONAL_JAVA_DIR)
+LOCAL_ADDITIONAL_DEPENDENCIES:=$(framework_docs_LOCAL_ADDITIONAL_DEPENDENCIES)
+
+LOCAL_MODULE := ds-ref-navtree
+
+LOCAL_DROIDDOC_OPTIONS:= \
+		$(framework_docs_LOCAL_DROIDDOC_OPTIONS) \
+		-hdf android.whichdoc online \
+		-toroot / \
+		-atLinksNavtree \
+		-navtreeonly
+
+LOCAL_DROIDDOC_CUSTOM_TEMPLATE_DIR:=build/tools/droiddoc/templates-sdk
+
+include $(BUILD_DROIDDOC)
+
 # ==== site updates for docs (on the androiddevdocs app engine server) =======================
 include $(CLEAR_VARS)