Polish humanize strings for one-handed mode page

- Add an intro for purpose or behavior
- Update footer description on usage, availability, or limitations

Bug: 218408813
Test: manual testing
Change-Id: I1712a3dcc08bf71ca8caf4097a23d465156bec22

res/values/strings.xml

@@ -11811,8 +11811,14 @@
     <string name="one_handed_mode_swipe_down_category">Swipe down to</string>
     <!-- Category title for one handed use the shortcut [CHAR_LIMIT=60] -->
     <string name="one_handed_mode_use_shortcut_category">Use the shortcut to</string>
+    <!-- One-handed mode intro Text [CHAR_LIMIT=NONE] -->
+    <string name="one_handed_mode_intro_text">Pull down the top half of your screen so it\u2019s easier to reach with one hand</string>
     <!-- One-handed mode Intro Text [CHAR_LIMIT=NONE] -->
-    <string name="one_handed_mode_intro_text">To use one handed mode, swipe down from the bottom edge of the screen. To use this feature, make sure gesture navigation is turned on in system navigation settings.</string>
+    <string name="one_handed_mode_footer_text">
+        <b>How to use one-handed mode</b>\n
+        • Make sure gesture navigation is selected in system navigation settings\n
+        • Swipe down near the bottom edge of the screen
+    </string>
     <!-- One-handed mode pull down screen into reach action title [CHAR_LIMIT=60] -->
     <string name="one_handed_action_pull_down_screen_title">Pull screen into reach</string>
     <!-- One-handed mode pull down screen into reach action title [CHAR_LIMIT=NONE] -->

res/xml/one_handed_settings.xml

@@ -22,6 +22,10 @@
     android:persistent="false"
     android:title="@string/one_handed_title">
 
+    <com.android.settingslib.widget.TopIntroPreference
+        android:key="gesture_one_handed_mode_intro"
+        android:title="@string/one_handed_mode_intro_text"/>
+
     <com.android.settingslib.widget.IllustrationPreference
         android:key="one_handed_header"
         settings:searchable="false"
@@ -33,10 +37,6 @@
         settings:keywords="@string/keywords_one_handed"
         settings:controller="com.android.settings.gestures.OneHandedMainSwitchPreferenceController"/>
 
-    <com.android.settingslib.widget.TopIntroPreference
-        android:key="gesture_one_handed_mode_intro_text"
-        android:title="@string/one_handed_mode_intro_text"/>
-
     <PreferenceCategory
         android:key="gesture_one_handed_mode_swipe_down"
         android:title="@string/one_handed_mode_swipe_down_category"
@@ -46,13 +46,18 @@
             android:key="gesture_one_handed_action_pull_screen_down"
             android:title="@string/one_handed_action_pull_down_screen_title"
             android:summary="@string/one_handed_action_pull_down_screen_summary"
-            settings:controller="com.android.settings.gestures.OneHandedActionPullDownPrefController"/>
+            settings:controller="com.android.settings.gesture_one_handed_mode_footer_textgestures.OneHandedActionPullDownPrefController"/>
 
         <com.android.settingslib.widget.SelectorWithWidgetPreference
             android:key="gesture_one_handed_action_show_notification"
             android:title="@string/one_handed_action_show_notification_title"
             android:summary="@string/one_handed_action_show_notification_summary"
             settings:controller="com.android.settings.gestures.OneHandedActionShowNotificationPrefController"/>
-
     </PreferenceCategory>
+
+    <com.android.settingslib.widget.FooterPreference
+        android:key="one_handed_mode_footer"
+        android:title="@string/one_handed_mode_footer_text"
+        android:selectable="false"
+        settings:searchable="false"/>
 </PreferenceScreen>