Allows features to link to other feature splits without namespacing.

Add uses-split dependencies to AppInfo. At link time, this is used
and allows features to reference other features, before
resource namespacing is implemented in Android Studio.

bug:135681292
Test: Link_test, ReferenceLinker_test, and integration tests.
Change-Id: Ifdf0067e7370552b6b9d4d6d4713d4484b6ea154
diff --git a/tools/aapt2/process/IResourceTableConsumer.h b/tools/aapt2/process/IResourceTableConsumer.h
index 30dad802..9c4b323 100644
--- a/tools/aapt2/process/IResourceTableConsumer.h
+++ b/tools/aapt2/process/IResourceTableConsumer.h
@@ -19,6 +19,7 @@
 
 #include <iostream>
 #include <list>
+#include <set>
 #include <sstream>
 
 #include "Diagnostics.h"
@@ -50,6 +51,7 @@
   virtual NameMangler* GetNameMangler() = 0;
   virtual bool IsVerbose() = 0;
   virtual int GetMinSdkVersion() = 0;
+  virtual const std::set<std::string>& GetSplitNameDependencies() = 0;
 };
 
 struct IResourceTableConsumer {