Simplify Iris app initialization and task updates

examples/bench_images/android.rs

@@ -2,19 +2,11 @@ use iris::prelude::*;
 
 #[path = "lib.rs"]
 mod app;
-use app::*;
-
-#[derive(AndroidUiState)]
-struct State {
-    ui_state: AndroidUiState,
-}
-
-impl AndroidAppState for State {
-    type Resources = StdRsc<Self>;
-}
 
 #[iris::app_init]
-fn create(mut ui_state: AndroidUiState, rsc: &mut StdRsc<State>) -> State {
-    let _ = build(rsc, &mut ui_state);
-    State { ui_state }
+fn create(
+    ui_state: &mut AndroidUiState,
+    rsc: &mut StdRsc<AndroidUiState>,
+) {
+    let _ = app::build(rsc, ui_state);
 }