Add host-side version of framework-protos.

AfwTestHarness needs to use framework-protos from host-side. This is why
new rule is added to build framework-protos usable from host-side.

Change-Id: Ifa35c5de04483d41e97c5853ea781fc29cef4947
diff --git a/proto/Android.mk b/proto/Android.mk
index a13a780..1c03d16 100644
--- a/proto/Android.mk
+++ b/proto/Android.mk
@@ -14,3 +14,20 @@
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk $(LOCAL_PATH)/jarjar-rules.txt
 
 include $(BUILD_STATIC_JAVA_LIBRARY)
+
+# Host-side version of framework-protos
+# ============================================================
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := host-framework-protos
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_PROTOC_OPTIMIZE_TYPE := nano
+LOCAL_SRC_FILES:= $(call all-proto-files-under, src)
+
+LOCAL_NO_STANDARD_LIBRARIES := true
+LOCAL_STATIC_JAVA_LIBRARIES := host-libprotobuf-java-nano
+
+LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk $(LOCAL_PATH)/jarjar-rules.txt
+
+include $(BUILD_HOST_JAVA_LIBRARY)
\ No newline at end of file