Add accessibility color inversion help resources to link to existing help page.

Bug: 151604096
Bug: 150873532
Test: manual test
Change-Id: Ie042d822de3ff5017548b8d92c74b208ee1f3a02
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 8a642ac..aca212d 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -7187,6 +7187,8 @@
     <string name="help_url_caption" translatable="false"></string>
     <!-- Help URL, Accessibility Timeout [DO NOT TRANSLATE] -->
     <string name="help_url_timeout" translatable="false"></string>
+    <!-- Help URL, Accessibility Color Inversion [DO NOT TRANSLATE] -->
+    <string name="help_url_color_inversion" translatable="false"></string>
     <string name="help_url_system_dashboard" translatable="false"></string>
     <string name="help_url_double_tap_screen" translatable="false"></string>
     <string name="help_url_account_detail" translatable="false"></string>
diff --git a/src/com/android/settings/accessibility/ToggleColorInversionPreferenceFragment.java b/src/com/android/settings/accessibility/ToggleColorInversionPreferenceFragment.java
index c0ad2ac..833c9f1 100644
--- a/src/com/android/settings/accessibility/ToggleColorInversionPreferenceFragment.java
+++ b/src/com/android/settings/accessibility/ToggleColorInversionPreferenceFragment.java
@@ -114,6 +114,11 @@
     }
 
     @Override
+    public int getHelpResource() {
+        return R.string.help_url_color_inversion;
+    }
+
+    @Override
     public void onSettingsClicked(ShortcutPreference preference) {
         super.onSettingsClicked(preference);
         showDialog(DialogEnums.EDIT_SHORTCUT);