Add VSR 15 and 16 as options in the cxx bindings

The rust library is aware of VSR 15 and 16 so update the cxx bindings to
also expose those to clients of that library, in particular the VTS
tests.

Test: TH
Change-Id: I4b5187130931872321c6f22fa1a46be4ca0a186d
3 files changed
tree: c6a4940b574c462464e108c08cd3e56bf0e7fcf6
  1. fuzzing/
  2. gdb/
  3. remote_provisioning/
  4. sanitizer-status/
  5. CleanSpec.mk
  6. OWNERS
  7. PREUPLOAD.cfg