Remove ENABLE_OVERVIEW_ACTIONS flag, defaulting to true

We no longer support the "peeking" model where the shelf would
peek on motion pause from an app and overview would peek on motion
pause from home. Thus, removed/inlined the following:
- FlingAndHoldTouchController (merged into its sole subclass
  NoButtonNavbarToOverviewTouchController)
- ShelfPeekAnim
- OverviewPeekState

Change-Id: I066a3ad2636fde4786089c922b896bf1e03361fd

quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java

@@ -50,7 +50,6 @@ import com.android.quickstep.SystemUiProxy;
 import com.android.quickstep.util.QuickstepOnboardingPrefs;
 import com.android.quickstep.util.RemoteAnimationProvider;
 import com.android.quickstep.util.RemoteFadeOutAnimationListener;
-import com.android.quickstep.util.ShelfPeekAnim;
 import com.android.quickstep.views.OverviewActionsView;
 import com.android.quickstep.views.RecentsView;
 import com.android.systemui.shared.system.ActivityManagerWrapper;
@@ -73,8 +72,6 @@ public abstract class BaseQuickstepLauncher extends Launcher
             (context, arg1, arg2) -> SystemUiProxy.INSTANCE.get(context).setBackButtonAlpha(
                     Float.intBitsToFloat(arg1), arg2 != 0);
 
-    private final ShelfPeekAnim mShelfPeekAnim = new ShelfPeekAnim(this);
-
     private OverviewActionsView mActionsView;
     protected HotseatPredictionController mHotseatPredictionController;
 
@@ -196,7 +193,7 @@ public abstract class BaseQuickstepLauncher extends Launcher
     }
 
     private boolean isOverviewActionsEnabled() {
-        return FeatureFlags.ENABLE_OVERVIEW_ACTIONS.get() && removeShelfFromOverview(this);
+        return removeShelfFromOverview(this);
     }
 
     public <T extends OverviewActionsView> T getActionsView() {
@@ -317,10 +314,6 @@ public abstract class BaseQuickstepLauncher extends Launcher
                 Stream.of(WellbeingModel.SHORTCUT_FACTORY));
     }
 
-    public ShelfPeekAnim getShelfPeekAnim() {
-        return mShelfPeekAnim;
-    }
-
     /**
      * Returns Prediction controller for hybrid hotseat
      */