Tapping the Unlink (briar side) and Stop (mailbox side) at the same time - mailbox stuck in StoppingMailbox

Steps to reproduce

• On two devices that are linked (I used Nokia 3.2 Android 10 for Briar and HTC E9 Android 5 for Mailbox) I open the mailbox status screen on each device.
• Then on briar I tap the unlink button and immediatley after (almost at the same time) I tap the Stop button on the mailbox side.

Expected results

This is a bit of a corner case, and not very likely to happen, but in case it does, the expected result should be graceful handling of this situation - either the wiping complete screen should be seen on the mailbox side, or mailbox stopped.

Actual result

Mailbox gets stuck in the Stopping Mailbox stateunlink_and_stop_button_together.txt