Add wifi calling slice to settings search and AGSA

Fixes: 121041498
Test: test if wifi calling slice is appeared in Settings Search
Change-Id: I4892da6e7d396f28bb232f8e520a8c946f35570d

src/com/android/settings/slices/SettingsSliceProvider.java

@@ -123,6 +123,7 @@ public class SettingsSliceProvider extends SliceProvider {
                     CustomSliceRegistry.FLASHLIGHT_SLICE_URI,
                     CustomSliceRegistry.LOCATION_SLICE_URI,
                     CustomSliceRegistry.MOBILE_DATA_SLICE_URI,
+                    CustomSliceRegistry.WIFI_CALLING_URI,
                     CustomSliceRegistry.WIFI_SLICE_URI,
                     CustomSliceRegistry.ZEN_MODE_SLICE_URI
             );