case ONLY_INTERNAL_STORAGE = true

clients like Dino can’t handle 12 byte IVs

The general security check is recommend so a third party can not ask us to send an internal file. But we don’t need to do this for files we attach ourself from within Conversations

The shortcut didn’t take care of message edits and some other things

Conscrypt on some plattforms doesn’t like when we close the CipherInputStream. Therefor we refactor the api to give us access to the inner stream so we can close that independently.