Update strings.xml

    <string name="f_number">F-number</string>

    <string name="camera">Càmera</string>

    <string name="exif">EXIF</string>

    <string name="song_title">Song title</string>

    <string name="song_title">Títol de la canço</string>

    <!-- Color customization -->

    <string name="background_color">Color del fons</string>