Add support for generated documentation as part of the SDK docs.

This can be done by adding the list of files to include to the
ALL_GENERATED_DOCS variable, and then making sure to put your generated output
files under $(OUT_DOCS)/gen.

Change-Id: Ie068a3fadccf7c990ec8e26b92ad408e7314469e
diff --git a/Android.mk b/Android.mk
index c1324c9..5f8b235 100644
--- a/Android.mk
+++ b/Android.mk
@@ -348,7 +348,7 @@
 			framework \
 
 framework_docs_LOCAL_MODULE_CLASS := JAVA_LIBRARIES
-framework_docs_LOCAL_DROIDDOC_HTML_DIR := docs/html
+framework_docs_LOCAL_DROIDDOC_HTML_DIR := $(LOCAL_PATH)/docs/html $(OUT_DOCS)/gen
 # The since flag (-since N.xml API_LEVEL) is used to add API Level information
 # to the reference documentation. Must be in order of oldest to newest.
 framework_docs_LOCAL_DROIDDOC_OPTIONS := \
@@ -539,8 +539,8 @@
 
 include $(BUILD_DROIDDOC)
 
-# explicitly specify that online-sdk depends on framework-res.
-$(full_target): framework-res-package-target
+# explicitly specify that online-sdk depends on framework-res and any generated docs
+$(full_target): framework-res-package-target $(ALL_GENERATED_DOCS)
 
 # ==== docs that have all of the stuff that's @hidden =======================
 include $(CLEAR_VARS)