am bd115338: allow dumpsys SurfaceFlinger in user builds from the shell user

    char buffer[SIZE];

    String8 result;

    if (!PermissionCache::checkCallingPermission(sDump)) {

    IPCThreadState* ipc = IPCThreadState::self();

    const int pid = ipc->getCallingPid();

    const int uid = ipc->getCallingUid();

    if ((uid != AID_SHELL) &&

            !PermissionCache::checkPermission(sDump, pid, uid)) {

        snprintf(buffer, SIZE, "Permission Denial: "

                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",

                IPCThreadState::self()->getCallingPid(),

                IPCThreadState::self()->getCallingUid());

                "can't dump SurfaceFlinger from pid=%d, uid=%d\n", pid, uid);

        result.append(buffer);

    } else {

        // Try to get the main lock, but don't insist if we can't