Add summary text to sliding key input preview settings

    <!-- Option summary for showing language switch key [CHAR LIMIT=65] -->

    <string name="show_language_switch_key_summary">Show when multiple input languages are enabled</string>

    <!-- Option to enable sliding key input preview. The user can see a rubber band during sliding key input. [CHAR LIMIT=30]-->

    <string name="sliding_key_input_preview">Sliding key input preview</string>

    <!-- Option to enable sliding key input indicator. The user can see a rubber band-like effect during sliding key input. [CHAR LIMIT=30]-->

    <string name="sliding_key_input_preview">Show slide indicator</string>

    <!-- Option summary to enable sliding key input indicator. The user can see a rubber band-like effect during sliding key input. [CHAR LIMIT=65]-->

    <string name="sliding_key_input_preview_summary">Display visual cue while sliding from Shift or Symbol keys</string>

    <!-- Option for the dismiss delay of the key popup [CHAR LIMIT=25] -->

    <string name="key_preview_popup_dismiss_delay">Key popup dismiss delay</string>

            <CheckBoxPreference

                android:key="pref_sliding_key_input_preview"

                android:title="@string/sliding_key_input_preview"

                android:summary="@string/sliding_key_input_preview_summary"

                android:persistent="true"

                android:defaultValue="true" />

            <ListPreference