Fix VTS errors of the network scan API

Since the new network scan API is only supported by some devices, we
should add the REQUEST_NOT_SUPPORTED to the possible returned errors.

Test: Telephony sanity tests, run vts -m VtsHalRadioV1_1Target
Bug: 63914600
Change-Id: I965ee6422aaa5e02bf67466f5288b808183f1738
1 file changed