Revert "Add primary switch for vibration settings screen"

This reverts commit fd54fc34c6.

Reason for revert: b/215275738

Change-Id: I93612df6493a2a4184a98b3f049e23aa888095f2

src/com/android/settings/accessibility/RingVibrationTogglePreferenceController.java

@@ -18,6 +18,8 @@ package com.android.settings.accessibility;
 
 import android.content.Context;
 
+import com.android.settings.accessibility.RingVibrationIntensityPreferenceController.RingVibrationPreferenceConfig;
+
 /** Preference controller for ringtone vibration with only a toggle for on/off states. */
 public class RingVibrationTogglePreferenceController extends VibrationTogglePreferenceController {