Generate progress events from app process for app animations.

Bug: 261654570
Flag: None
Test: atest BackNavigationControllerTest
Test: atest OnBackInvokedCallbackGestureTest
Test: atest BackAnimationControllerTest
Test: atest BackTouchTrackerTest
Test: atest WindowOnBackInvokedDispatcherTest

Change-Id: I075c099d59012825583fd9beda29a33d00f4d077
diff --git a/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java b/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java
index 79b09fd..225b127 100644
--- a/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java
+++ b/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java
@@ -220,6 +220,11 @@
                 }
             });
         }
+
+        @Override
+        public void setTriggerBack(boolean triggerBack) {
+            // TODO(b/261654570): track touch from the Launcher process.
+        }
     }
 
     private static class RemoteAnimationRunnerStub extends IRemoteAnimationRunner.Stub {