Fix usage of TelephonyNetworkFinder after making it a SystemApi

This changes the way TelephonyNetworkFinder is accessed. Instead of accessing TelephonyLookup and requesting the finder from there it is accessed directly from the finder itself via the static getInstance() method.

Flag: android.timezone.flags.expose_time_zone_system_api
Test: atest FrameworksTelephonyTests
Bug: 432239933
Bug: 432471550
Change-Id: I70a1973d82b92b1bf2f915d3644a131972d655b3
4 files changed