Rename app_init to android_init

examples/tabs/android.rs

@@ -22,7 +22,7 @@ impl AndroidAppState for Client {
     }
 }
 
-#[iris::app_init]
+#[iris::android_init]
 fn create(mut ui_state: AndroidUiState, rsc: &mut StdRsc<Client>) -> Client {
     let widgets = app::build(rsc, &mut ui_state);
     app::update_info(rsc, widgets.info, 0);