Clear cached session data

[olemis]

Feature description

Clear internal cached session data.

Is your feature request related to a problem? Please describe.
User has no control over cached PIN , etc ...

Describe the solution you'd like
Implement a new message for clearing session data

Additional context
Refs fibercrypto/skywallet-protob#

Possible implementation

• Clear PIN
• Clear passphrase
• Cancel ongoing operations