Implement notification decryption in CommNotificationsHandler
Summary: This differential implements notification decryption in CommNotificationsHandler
Test Plan:
- Pull cookie id of currently logged in Android user from the db.
- Use method implemented in previous differential to encrypt android notification in send.js. Hardcode cookie id from step.1.
- Send notification. Ensure it is currectly displayed.
Reviewers: tomek, bartek
Reviewed By: tomek
Subscribers: anunay, ashoat, atul
Differential Revision: https://phab.comm.dev/D7873