Sip Message Validators (2/2)

Adds a host of sip message validators that validate that the SIP
Message requests being sent from the RCS are not restricted/incorrect:
1) Ensure the SIP message has a correct start line
2) Ensure the SIP request methods REGISTER, PUBLISH, OPTIONS are restricted
3) Ensure the SIP request method SUBSCRIBE with event header "presence"
    is restricted

Bug: 173828358
Test: atest TeleServiceTests CtsTelephonyTestCases:SipDelegateManagerTest
Change-Id: Id90778f3a05f69be77c26a89284e194a49810ab0
14 files changed