GesturesSettingPreferenceController to Toggle

Convert GesturesSettingPreferenceController to
TogglePreferenceController,
All of its children need follow the change,
add setter and robotest for them:
AssistGestureSettingsPreferenceController
DoubleTapPowerPreferenceController
DoubleTapScreenPreferenceController
DoubleTwistPreferenceController
PickupGesturePreferenceController
SwipeToNotificationPreferenceController

Change-Id: I792b2d370eea828bf345fb2b1cc3eac260eb66f4
Fixes: 74913806
Fixes: 67998110
Fixes: 67998098
Fixes: 67998048
Fixes: 67998069
Fixes: 67997452
Test: make RunSettingsRoboTests

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

@@ -84,9 +84,11 @@ public class AssistGestureSettings extends DashboardFragment {
 
                 @Override
                 protected boolean isPageSearchEnabled(Context context) {
-                    return new AssistGestureSettingsPreferenceController(context,
-                            null /* lifecycle */, null /* key */, false /* assistOnly */)
-                            .isAvailable();
+                    AssistGestureSettingsPreferenceController controller =
+                            new AssistGestureSettingsPreferenceController(context,
+                                    "gesture_assist_input_summary");
+                    controller.setAssistOnly(false);
+                    return controller.isAvailable();
                 }
             };
 }