[CommCoreModule] Use braced initialization in CryptoModule

Summary:
noop, just noticed while working in CryptoModule and took 2 seconds to fix

see: https://www.notion.so/commapp/C-coding-standards-8c9f22b4b16a41c3a868eb5f537db1de#7de58b7ac3c0402bbae2a4e3b6b6738c for context

Test Plan: Continues to build

Reviewers: karol-bisztyga, varun, palys-swm, jimpo, ashoat

Reviewed By: palys-swm, ashoat

Subscribers: benschac, ashoat, Adrian

Differential Revision: https://phabricator.ashoat.com/D3270