Update no wifi networks string

    <!-- QuickSettings: Wifi (Off) [CHAR LIMIT=NONE] -->

    <string name="quick_settings_wifi_off_label">Wi-Fi Off</string>

    <!-- QuickSettings: Wifi detail panel, text when there are no items [CHAR LIMIT=NONE] -->

    <string name="quick_settings_wifi_detail_empty_text">No saved networks available</string>

    <string name="quick_settings_wifi_detail_empty_text">No Wi-Fi networks available</string>

    <!-- QuickSettings: Cast title [CHAR LIMIT=NONE] -->

    <string name="quick_settings_cast_title">Cast</string>

    <!-- QuickSettings: Cast detail panel, status text when casting [CHAR LIMIT=NONE] -->