move ImeOptions + InputType to src/input.rs + fills out

This adds and documents the remaining `ImeOptions` (addressing TODO comment)

Author: rib

android-activity/src/game_activity/mod.rs

@@ -29,14 +29,13 @@ use crate::util::{
     try_get_path_from_ptr,
 };
 use crate::{
-    AndroidApp, ConfigurationRef, ImeOptions, InputStatus, InputType, MainEvent, PollEvent, Rect,
-    WindowManagerFlags,
+    AndroidApp, ConfigurationRef, InputStatus, MainEvent, PollEvent, Rect, WindowManagerFlags,
 };
 
 mod ffi;
 
 pub mod input;
-use crate::input::{TextInputState, TextSpan};
+use crate::input::{ImeOptions, InputType, TextInputState, TextSpan};
 use input::{InputEvent, KeyEvent, MotionEvent};
 
 // The only time it's safe to update the android_app->savedState pointer is