Make topology hint readable when block is under it

        android:id="@+id/display_topology_pane_content"

        android:layout_width="match_parent"

        android:layout_height="match_parent"/>

    <TextView

        android:id="@+id/topology_hint"

    <!-- Give the textview a solid-color background (the same as the pane) in

         order to make the text clear when a DisplayBlock is drawn under it as

         part of display_topology_pane_content.

         If the padding is in the TextView, then the background will fill the

         padding, which we don't want vertically, as there is a lot of vertical

         padding. We do need some horizontal padding because otherwise the

         rounded corners will touch the edge of the text. -->

    <FrameLayout

        android:importantForAccessibility="no"

        android:layout_height="wrap_content"

        android:layout_width="wrap_content"

        android:layout_gravity="top|center_horizontal"

        android:paddingBottom="10dp"

        android:paddingTop="10dp" />

        android:paddingVertical="10dp">

        <TextView

            android:id="@+id/topology_hint"

            android:background="@drawable/display_topology_background"

            android:paddingHorizontal="5dp"

            android:layout_height="wrap_content"

            android:layout_width="wrap_content" />

    </FrameLayout>

</FrameLayout>