Update string for Do not disturb preference.

    <string name="boot_sounds_title">Power on sounds</string>

    <!-- Sound: Title for the Do not Disturb option and associated settings page. [CHAR LIMIT=50]-->

    <string name="zen_mode_settings_title">Do not disturb preferences</string>

    <string name="zen_mode_settings_title">Do Not Disturb preferences</string>

    <!-- Sound: Summary for the Do not Disturb option when there is no automatic rules turned on. [CHAR LIMIT=NONE]-->

    <string name="zen_mode_settings_summary_off">No automatic rules turned on</string>

    <!-- Sound: Summary for the Do not Disturb option when at least one automatic rules turned on. [CHAR LIMIT=NONE]-->

    <plurals name="zen_mode_settings_summary_on">

        <item quantity="one">1 automatic rule turned on</item>

        <item quantity="other"><xliff:g id="on_count" example="10">%d</xliff:g> automatic rules turned on</item>

    </plurals>

    <!-- Do not disturb: Title for the Priority interruptions option and associated settings page. [CHAR LIMIT=30] -->

    <string name="zen_mode_priority_settings_title">Priority only allows</string>