Revert "Don't write user_switcher_enabled value when enter this Settings"

This reverts commit 898d6b4d73.

Reason for revert: Causing a regression
Bug: 153944718

Change-Id: If96441618d32a65b0bae4c5c26fb3b278556cc8c

src/com/android/settings/users/MultiUserSwitchBarController.java

@@ -52,6 +52,8 @@ public class MultiUserSwitchBarController implements SwitchWidgetController.OnSw
         mListener = listener;
         mUserCapabilities = UserCapabilities.create(context);
         mSwitchBar.setChecked(mUserCapabilities.mUserSwitcherEnabled);
+        Settings.Global.putInt(mContext.getContentResolver(),
+                Settings.Global.USER_SWITCHER_ENABLED, mSwitchBar.isChecked() ? 1 : 0);
 
         if (mUserCapabilities.mDisallowSwitchUser) {
             mSwitchBar.setDisabledByAdmin(RestrictedLockUtilsInternal