[Settings] Update EID in background

Access EID in background thread to avoid blocking UI.

Bug: 153407357
Test: make RunSettingsRoboTests -j ROBOTEST_FILTER=SimStatusDialogControllerTest
Merged-In: Id30851bbd0b0fe080ed703586f9718be8b97abdd
Change-Id: I23fc6168d939bb5cb5e281413462176e7221819c
2 files changed