[SB][Sat] Add carrier text logs, make device-based sat VM a singleton.

1) Adds more logs around how we determine the satellite carrier text to
   help us debug b/341841138.
2) Makes the DeviceBasedSatelliteViewModel into a singleton, which may
   just fix b/341841138? It looks like there were previously two
   instances of the VM, one for lockscreen and one for shade (because
   CarrierTextManager is *not* a singleton and was injecting the view
   model). So, it's possible the 10s delay in showing satellite info was
   being triggered at different times in the two VM instances, causing
   differences between lockscreen and shade.

Bug: 341841138
Test: Use demo satellite mode, dump logs for CarrierTextManagerLog,
ShadeCarrierGroupControllerLog, and DeviceBasedSatelliteInputLog
Flag: NONE Adding logs only

Change-Id: I96bf9de1248e25a8d32e8440c161db2508a91eff