Merge "Add new string for sound settings" into pi-dev

    <!-- Sound: Title for the option managing media volume. [CHAR LIMIT=30] -->

    <string name="media_volume_option_title">Media volume</string>

    <!-- Sound: Title for the option managing call volume. [CHAR LIMIT=30] -->

    <string name="call_volume_option_title">Call volume</string>

    <!-- Sound: Title for the option managing alarm volume. [CHAR LIMIT=30] -->

    <string name="alarm_volume_option_title">Alarm volume</string>