Profile picture isn't shown if settings screen is recreated after process was killed

Steps to reproduce:

• Open the Briar settings screen
• Leave Briar running in the foreground and turn the screen off
• Use the ADB shell to kill the Briar process
• Turn the screen back on
• The Briar password prompt is shown
• Sign into Briar
• The settings screen is shown
• The profile picture isn't loaded

Tested on the Nexus 5X (Android 8.1.0).