[fenix] For https://github.com/mozilla-mobile/fenix/issues/3278 - Fixes property order in search_engine_radio_button.xml

app/src/main/res/layout/search_engine_radio_button.xml

@@ -2,11 +2,11 @@
    - License, v. 2.0. If a copy of the MPL was not distributed with this
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 
-
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_height="@dimen/search_engine_radio_button_height"
     android:layout_width="match_parent"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:background="?android:selectableItemBackground"
     android:clickable="true"
     android:focusable="true">