Prevent system uid component from running in an app process

            // should never happen).

            SparseArray<ProcessRecord> procs = mProcessNames.getMap().get(processName);

            if (procs == null) return null;

            final int N = procs.size();

            for (int i = 0; i < N; i++) {

                if (UserHandle.isSameUser(procs.keyAt(i), uid)) return procs.valueAt(i);

            final int procCount = procs.size();

            for (int i = 0; i < procCount; i++) {

                final int procUid = procs.keyAt(i);

                if (UserHandle.isApp(procUid) || !UserHandle.isSameUser(procUid, uid)) {

                    // Don't use an app process or different user process for system component.

                    continue;

                }

                return procs.valueAt(i);

            }

        }

        ProcessRecord proc = mProcessNames.get(processName, uid);