Implement previously connected device UI

* Move save device group to "Previously connected devices"

Bug: 74134939
Test: make -j60 RunSettingsRoboTests
Change-Id: Iff7894033df402d42dcc0ccaea6db3106edb7013
Merged-In: Iff7894033df402d42dcc0ccaea6db3106edb7013
11 files changed