Telecom: Send call state update to newly connected BluetoothHeadset service

* Call updateHeadsetWithCallState(true) when BluetoothHeadset service is
  connected

Bug: 109790139
Test: toggle Bluetooth while call is active
Change-Id: I8f0d981cf1cfc29409e4f50bd54a66a41280330e
(cherry picked from commit 9c0d4be940f8e4834bc061dd12d5377dabda39bb)