VNDK snapshot tool generates license information from json

VNDK snapshot zip file includes license information in json files.
Instead of parsing the license text files, read the information from
the json files.
VNDK snapshot v33 and older do not include this information and must
parse the license text files as before.

Bug: 277317599
Test: generate snapshots with/without json information && m nothing
Change-Id: Ibdbc571c9effe6c17f5d82a7a0894ad2d800711f
4 files changed