Remove displaying of WifiCalling twice in Settings search.

+ WifiCalling was getting displayed twice due to addition of
WifiCallingSettings screen in Settings ranking & index files.
+ This also solves issue of displaying WifiCalling option in non supported
carrier/platform.

Bug: 25669303
Change-Id: I179128d1f3c876a4d3f826e0365cbb2b761d57dd

src/com/android/settings/search/SearchIndexableResources.java

@@ -295,13 +295,6 @@ public final class SearchIndexableResources {
                         NO_DATA_RES_ID,
                         LegalSettings.class.getName(),
                         R.drawable.ic_settings_about));
-
-        sResMap.put(WifiCallingSettings.class.getName(),
-                new SearchIndexableResource(
-                        Ranking.getRankForClassName(WifiCallingSettings.class.getName()),
-                        R.xml.wifi_calling_settings,
-                        WifiCallingSettings.class.getName(),
-                        R.drawable.ic_settings_wireless));
     }
 
     private SearchIndexableResources() {