Camera: Disallow dumping clients directly

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

Bug: 26265403
Change-Id: If3ca4718ed74bf33ad8a416192689203029e2803

void CameraDeviceClient::notifyShutter(int requestId,
 nsecs_t timestamp) {
    sp<ICameraDeviceCallbacks> remoteCb = getRemoteCallback();
 if (remoteCb != 0) {
        remoteCb->onCaptureStarted(requestId, timestamp);
 }
}

void CameraDeviceClient::notifyShutter(int requestId,
 nsecs_t timestamp) {
    sp<ICameraDeviceCallbacks> remoteCb = getRemoteCallback();
 if (remoteCb != 0) {
        remoteCb->onCaptureStarted(requestId, timestamp);
 }
}
