Remove unused rust_bindgen include_dirs

In libinput_bindgen, `include_dirs` is unused (and the path does not
exist as the value is expected to be relative to the module directory).

Remove the unused property from the module definition.

Test: m
Change-Id: I27f27878117595a1f5673f0e5168bb3dd249adeb
diff --git a/libs/input/Android.bp b/libs/input/Android.bp
index 252040d..999145a 100644
--- a/libs/input/Android.bp
+++ b/libs/input/Android.bp
@@ -79,10 +79,6 @@
     visibility: ["//frameworks/native/services/inputflinger"],
     wrapper_src: "InputWrapper.hpp",
 
-    include_dirs: [
-        "frameworks/native/include",
-    ],
-
     source_stem: "bindings",
 
     bindgen_flags: [