[Feature suggestion] Option to render remote contents with user consent

[martgil]

Description: A FlowCrypt Android app user has expressed interest in a feature that allows loading remote content in their emails - Ideally, they might be looking for an option which can be set whether to render remote contents (which would be disabled by default).

Reference: https://mail.google.com/mail/u/human@flowcrypt.com/#inbox/FMfcgzQVxHkmPbQvXrXLvnmlLKnjzZlf

[DenBond7]

For now, all content is filtered by the app. Also, we disabled JavaScript(for security reasons). This issue should be discussed.