[res] Start using the native's header library

It adds a few useful classes, like SmallVector, to optimize
the most common use cases in Resources

Flag: EXEMPT build change
Test: builds
Change-Id: Ia386a86c4f5578abe3024226bda755687fede014
diff --git a/libs/androidfw/Android.bp b/libs/androidfw/Android.bp
index 2fff4f5..a39f30b 100644
--- a/libs/androidfw/Android.bp
+++ b/libs/androidfw/Android.bp
@@ -44,6 +44,9 @@
         "-Werror",
         "-Wunreachable-code",
     ],
+    header_libs: [
+        "native_headers",
+    ],
     target: {
         windows: {
             // The Windows compiler warns incorrectly for value initialization with {}.