Reland exporting create_snapshot

Previous attempt: aosp/2743815
Disabled on windows & mac.

Test: presubmit, (previously failed build: https://android-build.googleplex.com/builds/abtd/run/L06100000962955289?referrer=email now passing)
Bug: 290951369
Change-Id: I3d8084c13d843ea5919e3b50a0513faf386ccfed