Refactor DefaultAppPicker to a general radio button picker

Bug: 36557316
Test: make RunSettingsRoboTests
Change-Id: I52985e527e55697cf29f8d97d775d4bbed025beb

src/com/android/settings/applications/assist/DefaultAssistPreferenceController.java

@@ -83,6 +83,6 @@ public class DefaultAssistPreferenceController extends DefaultAppPreferenceContr
         if (cn == null) {
             return null;
         }
-        return new DefaultAppInfo(mUserId, cn);
+        return new DefaultAppInfo(mPackageManager, mUserId, cn);
     }
 }