Add "CONNECTING" state for before outgoing call broadcast returns

Immediately add a call to Telecomm before the outgoing call broadcast
intent returns, this will reduce the latency for the InCallUI by
allowing the InCallActivity to start before Telecomm has responded.

Bug: 16396523
Change-Id: Iada2a6bdb803794a765b81edb2dfb0953445ae43
3 files changed