Cache ITelephony/IRcsController and notify Connector upon death

Cache the Binder node to telephony and When the phone process
dies, add the ability to notify apps with persistent listeners
of the event so the event can be communicated back to the app hosting
the listener and they can take action to recover.

Bug: 160768091
Test: atest FrameworksTelephonyTests ImsCommonTests
Change-Id: Iacfce952d16dbdfcf750469f104a24f468499e3f