Merge "Null check when getting list of widget receivers" into ub-launcher3-burnaby

                    PackageManager pm = context.getPackageManager();

                    for (String pkg : mPackages) {

                        try {

                            needToRefresh |= !pm.queryBroadcastReceivers(

                            List<ResolveInfo> widgets = pm.queryBroadcastReceivers(

                                    new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE)

                                            .setPackage(pkg), 0).isEmpty();

                                            .setPackage(pkg), 0);

                            needToRefresh |= widgets != null && !widgets.isEmpty();

                        } catch (RuntimeException e) {

                            if (LauncherAppState.isDogfoodBuild()) {

                                throw e;