[Networking] Use SharingStarted.Eagerly for broadcast

The network name that comes from the ACTION_SERVICE_PROVIDERS_UPDATED
intent needs to be always listening because in some cases the sticky
broadcast is not representative of the information that we need.

Bug: 322432056
Test: MobileConnectionRepositoryTest
Test: Reboot device and insert SIM. Check QS internet tile
Flag: NONE
Change-Id: Iaf53aae3d29148765232f05ba15d0a3439d3d9ee