Add a separate version of the docs build that only does the stubs.

That way we don't have to wait for clearsilver to write the thousands
of html files during every build.

(this is the frameworks/base change, there is also a build change)
diff --git a/Android.mk b/Android.mk
index b11877e..9c5773f 100644
--- a/Android.mk
+++ b/Android.mk
@@ -362,6 +362,34 @@
 		-hdf sdk.rel.id $(framework_docs_SDK_REL_ID) \
 		-hdf sdk.current $(framework_docs_SDK_CURRENT_DIR)
 
+# ====  the api stubs and current.xml ===========================
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:=$(framework_docs_LOCAL_SRC_FILES)
+LOCAL_INTERMEDIATE_SOURCES:=$(framework_docs_LOCAL_INTERMEDIATE_SOURCES)
+LOCAL_JAVA_LIBRARIES:=$(framework_docs_LOCAL_JAVA_LIBRARIES)
+LOCAL_MODULE_CLASS:=$(framework_docs_LOCAL_MODULE_CLASS)
+LOCAL_DROIDDOC_SOURCE_PATH:=$(framework_docs_LOCAL_DROIDDOC_SOURCE_PATH)
+LOCAL_DROIDDOC_HTML_DIR:=$(framework_docs_LOCAL_DROIDDOC_HTML_DIR)
+LOCAL_ADDITIONAL_JAVA_DIR:=$(framework_docs_LOCAL_ADDITIONAL_JAVA_DIR)
+
+LOCAL_MODULE := api-stubs
+
+LOCAL_DROIDDOC_OPTIONS:=\
+		$(framework_docs_LOCAL_DROIDDOC_OPTIONS) \
+		-stubs $(TARGET_OUT_COMMON_INTERMEDIATES)/JAVA_LIBRARIES/android_stubs_current_intermediates/src \
+		-apixml $(INTERNAL_PLATFORM_API_FILE) \
+		-nodocs
+
+LOCAL_DROIDDOC_CUSTOM_TEMPLATE_DIR:=build/tools/droiddoc/templates-sdk
+LOCAL_DROIDDOC_CUSTOM_ASSET_DIR:=assets-sdk
+
+include $(BUILD_DROIDDOC)
+
+$(full_target): $(framework_built)
+$(INTERNAL_PLATFORM_API_FILE): $(full_target)
+$(call dist-for-goals,sdk,$(INTERNAL_PLATFORM_API_FILE))
+
 # ====  static html in the sdk ==================================
 include $(CLEAR_VARS)
 
@@ -380,10 +408,7 @@
 		-title "Android SDK" \
 		-proofread $(OUT_DOCS)/$(LOCAL_MODULE)-proofread.txt \
 		-todo $(OUT_DOCS)/$(LOCAL_MODULE)-docs-todo.html \
-		-stubs $(TARGET_OUT_COMMON_INTERMEDIATES)/JAVA_LIBRARIES/android_stubs_current_intermediates/src \
-		-apixml $(INTERNAL_PLATFORM_API_FILE) \
 		-sdkvalues $(OUT_DOCS) \
-		-warning 3 \
 		-hdf android.whichdoc offline
 
 LOCAL_DROIDDOC_CUSTOM_TEMPLATE_DIR:=build/tools/droiddoc/templates-sdk
@@ -399,8 +424,6 @@
 
 $(full_target): $(static_doc_index_redirect)
 $(full_target): $(framework_built)
-$(INTERNAL_PLATFORM_API_FILE): $(full_target)
-$(call dist-for-goals,sdk,$(INTERNAL_PLATFORM_API_FILE))
 
 
 # ==== docs for the web (on the google app engine server) =======================