Encrypt kdf logs using a key derived from seed phrase

[gcharang]

Currently, the logs are stored in plain text (natively and in browser)

To protect privacy of users, the logs should be encrypted. If it doesn't make sense to encrypt all the log data, at least coin names, balances, swap info should be encrypted.

To share the logs with a trusted 3rd party, kdf could implement a RPC that will export unencrypted logs

Related to: #1939