Return with error logs instead of exception for unexpected nsi

The network scan info will be removed when the scan is stopped
or cancelled. In this case, race condition would happen if ril
returns the scan result at the same time.

Bug: 277162146
Test: make
Test: atest CtsTelephonyTestCases FrameworksTelephonyTests
Change-Id: I1fc42a10ea17baa5a020164d2d8eb425e9b97029