The fix for #1001 caused a regression: the Bluetooth address and UUID aren't stored in the local transport properties until contact connections are enabled. This causes the following issue: * Turn off wifi * Start Briar with a fresh account, add a contact via Bluetooth * Messages can be exchanged with the contact * Sign out and back in * Enable Bluetooth contact connections in Briar settings * Bluetooth plugin can't connect to contact because it doesn't have contact's address or UUID On the beta branch, which doesn't have the fix for #1001, the Bluetooth plugin connects in the last step.