Retroactively add Goncalo's commits

[yshyn-iohk]

Proposed feature

@goncalo-frade-iohk , the following commit should be added to the repo

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I, goncalo-frade-iohk, retroactively sign off on these commits:
commit f071fe7 feat(sample): enable sample app for anoncreds verification
commit e519192 feat(backup): allow backup and import of prism wallet

Signed-off-by: goncalo-frade-iohk goncalo.frade@iohk.io