Settings: Fix wrong wifi drawable in screen zooming preview

We should use the same wifi drawable for the screen
zooming preview as the one the real settings menu
is using.

Change-Id: Ibb0d45b9f5aa431b52864aa826ea84c49b2d3fa0
Signed-off-by: Alex Naidis <alex.naidis@linux.com>
diff --git a/res/layout/screen_zoom_preview_settings.xml b/res/layout/screen_zoom_preview_settings.xml
index f93adc2..0205859 100644
--- a/res/layout/screen_zoom_preview_settings.xml
+++ b/res/layout/screen_zoom_preview_settings.xml
@@ -42,7 +42,7 @@
                 <ImageView
                     android:layout_width="48dp"
                     android:layout_height="48dp"
-                    android:src="@drawable/wifi_signal_dark"
+                    android:src="@drawable/ic_settings_wireless"
                     android:tint="?android:attr/colorAccent"
                     android:scaleType="center" />