Simplify Iris app initialization and task updates

app/src/android/transcript_client.rs

@@ -132,7 +132,6 @@ impl TranscriptClient {
     }
 
     fn spawn_fetch_sessions(&mut self, rsc: &mut StdRsc<Self>) {
-        let redraw = rsc.tasks.redraw_handle();
         let my_generation = self.generation.load(Ordering::SeqCst);
         let generation = self.generation.clone();
         rsc.spawn_task(async move |mut ctx| {
@@ -156,7 +155,6 @@ impl TranscriptClient {
                     }
                 }
             });
-            redraw.request_redraw();
         });
     }
 
@@ -166,7 +164,6 @@ impl TranscriptClient {
         self.session_id = Some(session_id.clone());
         self.show_message(rsc, "Loading transcript...");
 
-        let redraw = rsc.tasks.redraw_handle();
         let live_generation = self.generation.clone();
         rsc.spawn_task(async move |mut ctx| {
             let transports =
@@ -180,7 +177,6 @@ impl TranscriptClient {
                             state.show_message(rsc, &message);
                         }
                     });
-                    redraw.request_redraw();
                     return;
                 }
             };
@@ -214,8 +210,6 @@ impl TranscriptClient {
                     }
                 });
             }
-            redraw.request_redraw();
-
             if live_generation.load(Ordering::SeqCst) != my_generation {
                 return;
             }
@@ -239,7 +233,6 @@ impl TranscriptClient {
                                 }
                                 state.apply_event(rsc, &event);
                             });
-                            redraw.request_redraw();
                             true
                         }
                     },