Move assist gestures settings to overlay

Bug: 37427306

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

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

@@ -18,10 +18,24 @@ package com.android.settings.gestures;
 
 import android.content.Context;
 
+import com.android.settings.core.PreferenceController;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+
+import java.util.List;
+
 /** Feature provider for the assist gesture. */
 public interface AssistGestureFeatureProvider {
 
     /** Returns true if the assist gesture is supported. */
     boolean isSupported(Context context);
 
+    /** Returns true if the sensor is available. */
+    boolean isSensorAvailable(Context context);
+
+    /** Returns the resource */
+    int getPreferenceResourceId();
+
+    /** Returns a list of additional preference controllers */
+    List<PreferenceController> getControllers(Context context, Lifecycle lifecycle);
+
 }