Formalize EXTRA_SKIP_CALL_FILTERING as system API

As part of telecom mainline prep, resolve the hidden reference from wear
services to EXTRA_SKIP_CALL_FILTERING by promoting it to a system API.

Bug: 322518197
Bug: 311773409
Test: atest PhoneAccountOperationsTest

Change-Id: Id96460b6040a47b83106e0d32fbd6ec74ed20a07
1 file changed