[Sb refactor] Add logging to mobile connections pipeline

Add logging to all inputs into the mobile connections pipeline,
including the TelephonyCallback that is used to calculate most of the
relevant state for an individual icon

Test: MobileConnectionsRepositoryTest
Bug: 238425913
Bug: 240569788
Change-Id: I6eccf2d21f942a19dde8543a7926e3ce1c069db4