Make device picker activity below status bar

Test: manual test
Bug: 339191643
Change-Id: I448fea9d5e3694014d219f32f14ef52106b54194

res/layout/bluetooth_device_picker.xml

@@ -18,6 +18,7 @@
         android:gravity="center"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:fitsSystemWindows="true"
         android:orientation="vertical">
 
         <fragment android:id="@+id/bluetooth_fragment_settings"