Ignore MCC/MNC from RIL operator indication for locale

MCC/MNC from RIL operator indication is sometimes unreliable.
Ignore MCC/MNC from RIL operator indication for locale, but only
relying on MCC/MNC from registered or nearby cells.

Fix: 374589521
Test: atest ServiceStateTrackerTest
Test: Manually checking if locale is correct
Flag: com.android.internal.telephony.flags.ignore_mcc_mnc_from_operator_for_locale
Change-Id: Ib1e13c4178971cdae2a9baca5d14725c0c53e92f