Camera: Disallow dumping clients directly

Camera service dumps should only be initiated through
ICameraService::dump.

Bug: 26265403
Change-Id: If3ca4718ed74bf33ad8a416192689203029e2803

void CameraService::Client::notifyError() {
    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
}

void CameraService::Client::notifyError() {
    mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0);
}
