Adds flavor_access metafiles for api samples

Converts flavor_access api sample to create meta files for api sample docs.
We use this to auto generate the specification document

Change-Id: Idd61e4d9bb6f063914dbc40c9bb04dff60d0c567
Merge pull request #8 from Ivan-Zhu/flavor_access_doc

Adds flavor_access metafiles for api samples