Use IconDrawableFactory to load icons for default apps.

Bug: 64336923
Test: robotests
Change-Id: I2a4ca05a866784f97e247bad1c1679a6ec0f5efa

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

@@ -87,7 +87,7 @@ public class DefaultAssistPreferenceController extends DefaultAppPreferenceContr
         if (cn == null) {
             return null;
         }
-        return new DefaultAppInfo(mPackageManager, mUserId, cn);
+        return new DefaultAppInfo(mContext, mPackageManager, mUserId, cn);
     }
 
     @VisibleForTesting