media: libva: buffer_type: take ownership of ref_pic_list in the wrapper
media: libva: buffer_type: take ownership of ref_pic_list in the wrapper

It's not ergonomic for the calling code to pass in an array of
references.

Just take ownership of that array, as it's not going to be used again
when the calling code succeeds in creating the wrapper.

BUG=b:214478588
TEST="cargo test"

Change-Id: Ifbb78968ebb29b41fe2ccaa653f30a81fcb23427
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3783002
Reviewed-by: Alexandre Courbot <301cd6a3ea50a894b4b51e385c5eb12b9a4ffc0c@chromium.org>
Commit-Queue: Alexandre Courbot <301cd6a3ea50a894b4b51e385c5eb12b9a4ffc0c@chromium.org>

google/crosvm,google/crosvm,google/crosvm,google/crosvm