Check satellite enabled condition when request modem to report ntn signal strength

Currently, telephony sends command that requests start/stop sending ntn signal strength report to modem regardless satellite is enabled or not.
Mofidifed to send the command only when satellite is enabled

Bug: 323010064
Test: SatelliteControllerTest, manuall test using log
Change-Id: I6381165b7bdbf8898845471d8c315aa23704fa61