AAPT2: Add navigation type

Test: build succeeds
Change-Id: I7d49366c7cc4a93c29bad4cb9f13eec23ad05bd2
diff --git a/tools/aapt2/Resource.h b/tools/aapt2/Resource.h
index 0a74c1a..cbcc8fb 100644
--- a/tools/aapt2/Resource.h
+++ b/tools/aapt2/Resource.h
@@ -59,6 +59,7 @@
   kLayout,
   kMenu,
   kMipmap,
+  kNavigation,
   kPlurals,
   kRaw,
   kString,