Cleanup how we set back button alpha

Add BackButtonAlphaHandler to set back button alpha, instead of setting
it from multiple places.

Also force back button alpha to be 1 if swipe up is disabled (b/80091187)

Change-Id: I49b63a0e6b033a3a947a847669a398f1b9ff0564

1 files changed, 0 insertions, 9 deletions

diff --git a/src/com/android/launcher3/allapps/AllAppsTransitionController.java b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
index b5c821ac2..2c3e3ee7b 100644
--- a/src/com/android/launcher3/allapps/AllAppsTransitionController.java
+++ b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
@@ -25,11 +25,9 @@ import com.android.launcher3.LauncherState;
 import com.android.launcher3.LauncherStateManager.AnimationConfig;
 import com.android.launcher3.LauncherStateManager.StateHandler;
 import com.android.launcher3.R;
-import com.android.launcher3.Utilities;
 import com.android.launcher3.anim.AnimationSuccessListener;
 import com.android.launcher3.anim.AnimatorSetBuilder;
 import com.android.launcher3.anim.PropertySetter;
-import com.android.launcher3.uioverrides.UiFactory;
 import com.android.launcher3.util.Themes;
 import com.android.launcher3.views.ScrimView;
 
@@ -184,13 +182,6 @@ public class AllAppsTransitionController implements StateHandler, OnDeviceProfil
         anim.setDuration(config.duration);
         anim.setInterpolator(builder.getInterpolator(ANIM_VERTICAL_PROGRESS, interpolator));
         anim.addListener(getProgressAnimatorListener());
-        if (toState.hideBackButton) {
-            anim.addUpdateListener(animation -> {
-                final float alpha = (float) animation.getAnimatedValue();
-                UiFactory.setBackButtonAlpha(mLauncher, 1 - Utilities.boundToRange(alpha, 0, 1),
-                        false /* animate */);
-            });
-        }
 
         builder.play(anim);