Adding an optional QSB in hotseat

Removing sections in all-apps during transition and treating
it as a single unit

Bug: 175137718
Test: Manual
Change-Id: I55a501d80b5903f1a9d92a26b3784784fd9e50fd

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

@@ -17,10 +17,8 @@ package com.android.launcher3.allapps;
 
 import android.graphics.Rect;
 import android.view.View;
-import android.view.animation.Interpolator;
 
 import com.android.launcher3.DeviceProfile;
-import com.android.launcher3.anim.PropertySetter;
 
 /**
  * A abstract representation of a row in all-apps view
@@ -47,9 +45,6 @@ public interface FloatingHeaderRow {
      */
     boolean hasVisibleContent();
 
-    void setContentVisibility(boolean hasHeaderExtra, boolean hasAllAppsContent,
-            PropertySetter setter, Interpolator headerFade, Interpolator allAppsFade);
-
     /**
      * Scrolls the content vertically.
      */