No longer stash taskbar when swiping up all apps

Instead, scale down hotseat behind all apps alongside workspace.

Test: Swipe up to all apps from home; all apps button in an app works as before
Fixes: 221094533
Change-Id: Ia6f1e7bac86849018dc8d0b1d95f0bab963835a8

quickstep/src/com/android/launcher3/uioverrides/states/AllAppsState.java

@@ -66,11 +66,6 @@ public class AllAppsState extends LauncherState {
         return scaleAndTranslation;
     }
 
-    @Override
-    public boolean isTaskbarStashed(Launcher launcher) {
-        return true;
-    }
-
     @Override
     protected float getDepthUnchecked(Context context) {
         // The scrim fades in at approximately 50% of the swipe gesture.
@@ -93,7 +88,7 @@ public class AllAppsState extends LauncherState {
 
     @Override
     public int getVisibleElements(Launcher launcher) {
-        return ALL_APPS_CONTENT;
+        return ALL_APPS_CONTENT | HOTSEAT_ICONS;
     }
 
     @Override