SUW: use Gliflayout descriptions

Set description via getGlifLayout().setDescriptionText instead of
writing it in layout to display it properly in two columns when
in landscape. No visual change in portrait.

Change-Id: I7465a7fbc5819d429bb886a5582fb1f1d4db9a47

src/org/lineageos/setupwizard/DateTimeActivity.java

@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2016 The CyanogenMod Project
- * Copyright (C) 2017-2018,2020 The LineageOS Project
+ *               2017-2018,2020,2022 The LineageOS Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -78,6 +78,7 @@ public class DateTimeActivity extends BaseSetupWizardActivity implements
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setNextText(R.string.next);
+        getGlifLayout().setDescriptionText(getString(R.string.date_time_summary));
 
         final Spinner spinner = (Spinner) findViewById(R.id.timezone_list);
         final SimpleAdapter adapter = constructTimezoneAdapter(this);