DO NOT MERGE. Hide the usability study mode for the production

    <bool name="config_enable_show_voice_key_option">true</bool>

    <bool name="config_enable_show_popup_on_keypress_option">true</bool>

    <bool name="config_enable_next_word_suggestions_option">true</bool>

    <!-- TODO: Disable the following configuration for production. -->

    <bool name="config_enable_usability_study_mode_option">true</bool>

    <bool name="config_enable_usability_study_mode_option">false</bool>

    <!-- Whether or not Popup on key press is enabled by default -->

    <bool name="config_default_popup_preview">true</bool>

    <!-- Default value for next word suggestion: while showing suggestions for a word should we weigh