[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
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:736a954b04286afed7b5f03621dcd66b4d14da6b)
Merged-In: Iaf53aae3d29148765232f05ba15d0a3439d3d9ee
Change-Id: Iaf53aae3d29148765232f05ba15d0a3439d3d9ee