Add summary text to sliding key input preview settings

Bug: 8089491
Change-Id: I15801281a95b01c67ef23a9c1558d6cdf457d375
diff --git a/java/res/values/strings.xml b/java/res/values/strings.xml
index 1b518a1..e3cd84c 100644
--- a/java/res/values/strings.xml
+++ b/java/res/values/strings.xml
@@ -69,8 +69,10 @@
     <!-- 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>
diff --git a/java/res/xml/prefs.xml b/java/res/xml/prefs.xml
index da6e601..5ed0bb0 100644
--- a/java/res/xml/prefs.xml
+++ b/java/res/xml/prefs.xml
@@ -145,6 +145,7 @@
             <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