5445-Enable_openPGP_support_by_default

issue: https://gitlab.e.foundation/e/backlog/-/issues/5445

As we enable openPgp encryption by default, on the first run it may not
be configured. To configure it, user need to allow mail to access
openPgp. & to encyption to work, the openPgpKey also needs to be set up.

so if the encrptionStatus gives provider error & no openPgpKeyId set up,
means user doesn't configure encryption; so the mail send should be done
using no-encryption mode.

This commit also add missing licences.