Option to exclude insecure devices for Olm traffic, to be consistent with megolm sharing?

[BillCarsonFr]

Following the work on invisible crypto it is now possible to exclude devices not signed by their owner from participating in encrypted room:

• When encrypting via CollectStrategy/IdentityBased
• When decrypting via TrustRequirement

We also have an API to encrypt a message directly to a device (using olm):

matrix-rust-sdk/crates/matrix-sdk-crypto/src/identities/device.rs

Lines 407 to 412 in bdfe641

	/// Encrypt the given content for this `Device`.
	///
	/// # Arguments
	///
	/// * `content` - The content of the event that should be encrypted.
	pub(crate) async fn encrypt(

This can lead to a strange situation when the exclude insecure devices option is enabled and:

• Sharing a room key won't work for a given device
• Encrypting directly to this device would work

Maybe we would want to use some EncryptionSetting/DecryptionSetting for olm traffic?
Notice that we also don't look at the device trust status BlackListed/Ignored when encrypting in olm

[fkwp]

@toger5