Add a new section to show eligible Fast Pair devices.

The section only show at most 3 devices. If the device list size is
greater than 3, we will show a "See all".
The device Preference is ordered. FastPairDeviceUpdater will handle the
order logic.
Bug: 296507968
Test: FastPairDevicePreferenceControllerTest

Change-Id: I9692d5740dbc31ff50db0ebbf2c5535b726277c9