Fix "Available virtual keyboard" button string.

    <!-- Title of the pop-up dialog in which the user switches keyboard, also known as input method. -->

    <string name="select_input_method">Change keyboard</string>

    <!-- Title of a button to open the settings to enable or disable keyboards, also known as input methods [CHAR LIMIT=30] -->

    <string name="configure_input_methods">Choose keyboards</string>

    <!-- Title of a button to open the settings to enable or disable other soft keyboards (also known as input methods) [CHAR LIMIT=30] -->

    <string name="configure_input_methods">Other keyboards</string>

    <!-- Summary text of a toggle switch to enable/disable use of the IME while a physical

         keyboard is connected -->

    <string name="show_ime">Keep it on screen while physical keyboard is active</string>