Merge "Avoid NPE until we understand better." into jb-dev

        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            final Context context = view.getContext();

            final AppItem app = (AppItem) parent.getItemAtPosition(position);

            // TODO: sigh, remove this hack once we understand 6450986

            if (mUidDetailProvider == null || app == null) return;

            final UidDetail detail = mUidDetailProvider.getUidDetail(app.appId, true);

            AppDetailsFragment.show(DataUsageSummary.this, app, detail.label);

        }