Apply top intro preference in Settings app (1/n)

Based on content in footer, we need to convert some footers
to top info prefernce.

Test: Run robo test and see the screens
Bug: 173087905
Change-Id: Ie62a503481f9d385f5468896fba8f607cb3437d3
diff --git a/src/com/android/settings/TetherSettings.java b/src/com/android/settings/TetherSettings.java
index 74a0897..c33f7db 100644
--- a/src/com/android/settings/TetherSettings.java
+++ b/src/com/android/settings/TetherSettings.java
@@ -78,7 +78,7 @@
     private static final String KEY_ENABLE_ETHERNET_TETHERING = "enable_ethernet_tethering";
     private static final String KEY_DATA_SAVER_FOOTER = "disabled_on_data_saver";
     @VisibleForTesting
-    static final String KEY_TETHER_PREFS_FOOTER = "tether_prefs_footer";
+    static final String KEY_TETHER_PREFS_TOP_INTRO = "tether_prefs_top_intro";
 
     private static final String TAG = "TetheringSettings";
 
@@ -155,7 +155,7 @@
         }
 
         setupTetherPreference();
-        setFooterPreferenceTitle();
+        setTopIntroPreferenceTitle();
 
         mDataSaverBackend.addListener(this);
 
@@ -231,14 +231,14 @@
     }
 
     @VisibleForTesting
-    void setFooterPreferenceTitle() {
-        final Preference footerPreference = findPreference(KEY_TETHER_PREFS_FOOTER);
+    void setTopIntroPreferenceTitle() {
+        final Preference topIntroPreference = findPreference(KEY_TETHER_PREFS_TOP_INTRO);
         final WifiManager wifiManager =
                 (WifiManager) getContext().getSystemService(Context.WIFI_SERVICE);
         if (wifiManager.isStaApConcurrencySupported()) {
-            footerPreference.setTitle(R.string.tethering_footer_info_sta_ap_concurrency);
+            topIntroPreference.setTitle(R.string.tethering_footer_info_sta_ap_concurrency);
         } else {
-            footerPreference.setTitle(R.string.tethering_footer_info);
+            topIntroPreference.setTitle(R.string.tethering_footer_info);
         }
     }