[fenix] Fixes https://github.com/mozilla-mobile/fenix/issues/5128: Changed history_empty_view to match constraints.

The bug occurred because the activity/fragment is not recreated on
orientation change. A simple fix was to just set width and height to 0dp
to let it match constraints.

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

@@ -22,9 +22,9 @@
 
     <TextView
             android:id="@+id/history_empty_view"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_gravity="center"
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            android:gravity="center"
             android:text="@string/history_empty_message"
             android:textColor="?secondaryText"
             android:textSize="16sp"