Camera: Disallow dumping clients directly

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

Bug: 26265403
Change-Id: If3ca4718ed74bf33ad8a416192689203029e2803

void CameraService::setCameraBusy(int cameraId) {
    android_atomic_write(1, &mBusy[cameraId]);

    ALOGV("setCameraBusy cameraId=%d", cameraId);
}

void CameraService::setCameraBusy(int cameraId) {
    android_atomic_write(1, &mBusy[cameraId]);

    ALOGV("setCameraBusy cameraId=%d", cameraId);
}
