Re-fetch client configuration before sending password-protected messages

[sosnovsky]

Currently client configuration is fetched only on app launch, and as app can be kept in iOS memory for a long time, client configuration can become outdated.

After recent addition of password-protected messages compliance functionality (#2645), it's important to have up to date client configuration before sending password-protected message.

To fix it, let's implement client configuration re-fetch when sending password-protected message, so app will have the latest version of disallowPasswordMessagesForTerms array.
For now, re-fetch should be performed only in enterprise builds.

+ update ui test

android - FlowCrypt/flowcrypt-android#2975

[sosnovsky]

Hi @ioanmo226, please work on this one after finishing #2657, to prepare a new build with this fix on the next week. Thanks!