[lib] standarize broadcasting device list update when removing device

Summary:
Addressing https://phab.comm.dev/D13963#inline-78590 and https://phab.comm.dev/D13963#inline-78595.

Right now we have the same approach each time:

1. Sending device list updates to all our peers
2. Sending device list updates to all our devices that are on the device list, but without the primary device
3. Call getAndUpdateDeviceListsForUsers for our userID
   • update AuxUserStore
   • get platform details if the device was added

Depends on D13963

Test Plan: Remove secondary device and test if other peers received device list update

Reviewers: bartek, ashoat

Reviewed By: ashoat

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D13972