Update string to keep On-screen keyboard naming consistent

    <!-- Title for the 'virtual keyboard' preference sub-screen. [CHAR LIMIT=35] -->

    <string name="virtual_keyboard_category">On-screen keyboard</string>

    <!-- Title for the 'available virtual keyboard' preference sub-screen. [CHAR LIMIT=35] -->

    <string name="available_virtual_keyboard_category">Available virtual keyboard</string>

    <string name="available_virtual_keyboard_category">Available On-screen keyboard</string>

    <!-- Title for the button to trigger the 'Manage keyboards' preference sub-screen, where the user can turn on/off installed virtual keyboards.[CHAR LIMIT=35] -->

    <string name="add_virtual_keyboard">Manage on-screen keyboards</string>

    <!-- Title for the 'keyboard assistance' preference category. [CHAR LIMIT=35] -->

    <!-- Title for the 'Work profile keyboards & tools' preference category inside Languages and inputs'. [CHAR LIMIT=50] -->

    <string name="language_and_input_for_work_category_title">Work profile keyboards &amp; tools</string>

    <!-- Title for the 'Virtual keyboards for work' preference. [CHAR LIMIT=45] -->

    <string name="virtual_keyboards_for_work_title">Virtual keyboard for work</string>

    <string name="virtual_keyboards_for_work_title">On-screen keyboard for work</string>

    <!-- Summary text for keyboards when no layout has been selected. [CHAR LIMIT=35] -->

    <string name="default_keyboard_layout">Default</string>