ui: make native_window_set_usage be a static inline

Signed-off-by: Dima Zavin <dima@android.com>
diff --git a/include/ui/egl/android_natives.h b/include/ui/egl/android_natives.h
index 4c58e47..4747f4e 100644
--- a/include/ui/egl/android_natives.h
+++ b/include/ui/egl/android_natives.h
@@ -179,7 +179,7 @@
  *  reallocated.
  */
 
-inline int native_window_set_usage(
+static inline int native_window_set_usage(
         struct android_native_window_t* window, int usage)
 {
     return window->perform(window, NATIVE_WINDOW_SET_USAGE, usage);