Move assist gestures settings to overlay

Bug: 37427306

Test: make -j RunSettingsRoboTests && manual testing of settings
Change-Id: If2b0ec9a966334a91f090051dee661011bfc0d70

src/com/android/settings/gestures/AssistGestureFeatureProviderImpl.java

@@ -18,6 +18,13 @@ package com.android.settings.gestures;
 
 import android.content.Context;
 
+import com.android.settings.R;
+import com.android.settings.core.PreferenceController;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+
+import java.util.ArrayList;
+import java.util.List;
+
 public class AssistGestureFeatureProviderImpl implements AssistGestureFeatureProvider {
 
     @Override
@@ -25,4 +32,19 @@ public class AssistGestureFeatureProviderImpl implements AssistGestureFeaturePro
         return false;
     }
 
+    @Override
+    public boolean isSensorAvailable(Context context) {
+        return false;
+    }
+
+    @Override
+    public int getPreferenceResourceId() {
+        return R.xml.assist_gesture_settings;
+    }
+
+    @Override
+    public List<PreferenceController> getControllers(Context context, Lifecycle lifecycle) {
+        return new ArrayList<>();
+    }
+
 }