What's the recommended app to use to store nsecs on Android? I'd like to avoid having to enter it into each nostr app I use. Something similar to nostr:nprofile1qyv8wumn8ghj76twvfhhstnjv4kxz7tn9ekxzmny9uq35amnwvaz7tmvda3kkcn00qhxv6tpw34xze3wvdhk6tcqyqalp33lewf5vdq847t6te0wvnags0gs0mu72kz8938tn24wlfze6qkxh4c 's nos2x on desktop