Make libstatspull_bindgen available to virt apex.

The library is required to log the atoms from virt apex. See bug for more details
Test: m succeeded. The whole topic is tested with statsd_testdrive 409
as mentioned in go/westworld-create-atom#step-3-test-your-atom

Change-Id: If8b13c9d1878265bfcb8e09fc1bd8e78e968f71f