[Predictive Back] Remove animation on cancel for all apps to home

Framework has supported (ag/20876922) sending back progress on cancel. So no need to re-do the work on app side.

Bug: b/267664388
Test: manual, this CL has no visual change
Change-Id: I47c751d12a9b2c602ac6f3028665b996990fbd7e

src/com/android/launcher3/allapps/AllAppsTransitionController.java

@@ -277,17 +277,6 @@ public class AllAppsTransitionController
         mAllAppScale.updateValue(scaleProgress);
     }
 
-    @Override
-    public void onBackCancelled(LauncherState toState) {
-        if (!mLauncher.isInState(ALL_APPS) || !NORMAL.equals(toState)) {
-            return;
-        }
-
-        // TODO: once ag/20649618 is picked into tm-qpr, we don't need to animate back on cancel
-        // swipe because framework will do that for us in {@link #onBackProgressed}.
-        animateAllAppsToNoScale();
-    }
-
     private void onScaleProgressChanged() {
         final float scaleProgress = mAllAppScale.value;
         SCALE_PROPERTY.set(mLauncher.getAppsView(), scaleProgress);
@@ -312,12 +301,6 @@ public class AllAppsTransitionController
         }
     }
 
-    private void animateAllAppsToNoScale() {
-        mAllAppScale.animateToValue(1f)
-                .setDuration(REVERT_SWIPE_ALL_APPS_TO_HOME_ANIMATION_DURATION_MS)
-                .start();
-    }
-
     /**
      * Creates an animation which updates the vertical transition progress and updates all the
      * dependent UI using various animation events