Change String to CharSequence in #loadSummary.

Per API council review, localized strings should return CharSequence. Changes here
account for the different type returned.

Test: ag/1813674

Bug: 37723508

Change-Id: I7dacab8af48932db031de22835b65eba30393956

src/com/android/settings/accessibility/ShortcutServicePickerFragment.java

@@ -67,7 +67,7 @@ public class ShortcutServicePickerFragment extends DefaultAppPickerFragment {
             candidates.add(new DefaultAppInfo(mPm,
                     UserHandle.myUserId(),
                     installedServiceInfo.getComponentName(),
-                    installedServiceInfo.loadSummary(mPm.getPackageManager()),
+                    (String) installedServiceInfo.loadSummary(mPm.getPackageManager()),
                     true /* enabled */));
         }