Hide loading view if config service is not available

BUG: 381679609
Test: local tested
Flag: com.android.settings.flags.enable_bluetooth_device_details_polish
Change-Id: I2e633d2a78846d23f727f294bbd570185bd11dd0

src/com/android/settings/bluetooth/ui/view/DeviceDetailsFragmentFormatter.kt

@@ -138,8 +138,14 @@ class DeviceDetailsFragmentFormatterImpl(
     }
 
     private suspend fun updateLayoutInternal(fragmentType: FragmentTypeModel) {
-        val items = viewModel.getItems(fragmentType) ?: return
+        val items = viewModel.getItems(fragmentType) ?: run {
-        val layout = viewModel.getLayout(fragmentType) ?: return
+            fragment.setLoading(false, false)
+            return
+        }
+        val layout = viewModel.getLayout(fragmentType) ?: run {
+            fragment.setLoading(false, false)
+            return
+        }
 
         val prefKeyToSettingId =
             items