Restore deleted string still referenced from code to fix the build.

    <string name="spoken_description_smiley">Smiley face</string>

    <!-- Spoken description for the "Return" keyboard key. -->

    <string name="spoken_description_return">Return</string>

    <!-- Spoken description for the "\u2022" (BULLET) keyboard key. -->

    <string name="spoken_description_dot">Dot</string>

    <!-- Voice related labels -->