Remove libgui and libui dependencies for vendor libs.

  - This CL removes dependencies on libgui, libui and other remaining
  dependences, if build with RS_VENDOR_LIB defined.
  - We cannot remove the dependencies for platform RenderScript CPU
  fallback, because of the legacy graphics APIs.
  - Vendor drivers will be built without graphics APIs, the reference
  build file will be posted in another CL.

Bug: 34396220
Test: mm, CTS test pass with the vendor libs.
Change-Id: If90b600a58d0f81488f56a1e21ca332f1a235162
diff --git a/rsFont.h b/rsFont.h
index d08c6f2..956fddf 100644
--- a/rsFont.h
+++ b/rsFont.h
@@ -19,6 +19,7 @@
 
 #include "rsStream.h"
 #include <utils/KeyedVector.h>
+#include <utils/Unicode.h>
 
 struct FT_LibraryRec_;
 struct FT_FaceRec_;