Create base SipTransport implementation and make it available to
listeners.
Expose new SipDelegate creation capability to the framework from the
ImsService.
The next CL will start the integration of the SipDelegateManager
with the framework and SipTransport.
Bug: 154763999
Test: atest FrameworksTelephonyTests TeleServiceTests
Merged-In: I9a51b850f370a865c9d9109f238e8ed2eea4b6f6
Change-Id: I9a51b850f370a865c9d9109f238e8ed2eea4b6f6
[RESUBMISSION AFTER REVERT aosp/1443078]
Instead of requiring that listeners poll for an ImsFeature binder
when they go down, modify interfaces to notify listeners when a
new instance of a Binder is available.
Test: atest CtsTelephonyTestCases FrameworksTelephonyTests ImsCommonTests
Test: manual E2E tests of IMS functionality (call, SMS, settings...)
Merged-In: I0bb48f82ecf7a1283be8fd441a787dff587d6d61
Change-Id: I0bb48f82ecf7a1283be8fd441a787dff587d6d61
