Add data binding to built javadoc.

Bug 22175560

Change-Id: I979bcac5131270c679b6f1867c3211096696a86a
diff --git a/core/pathmap.mk b/core/pathmap.mk
index 87d3729..59c9be2 100644
--- a/core/pathmap.mk
+++ b/core/pathmap.mk
@@ -144,3 +144,18 @@
     android-support-multidex \
     android-support-multidex-instrumentation
 
+#
+# A list of all documented source roots under frameworks/data-binding.
+#
+FRAMEWORKS_DATA_BINDING_SUBDIRS := \
+        baseLibrary/src/main \
+        library/src/main \
+        library/src/doc
+
+#
+# A version of FRAMEWORKS_DATA_BINDING_SUBDIRS that is expanded to full paths from
+# the root of the tree.
+#
+FRAMEWORKS_DATA_BINDING_JAVA_SRC_DIRS := \
+	$(addprefix frameworks/data-binding/,$(FRAMEWORKS_DATA_BINDING_SUBDIRS))
+