Intent used to broadcast the change in connection state of the Headset profile.
This intent will have 3 extras:
BluetoothProfile.ExtraState or BluetoothProfile.ExtraPreviousState can be any of BluetoothProfile.STATE_DISCONNECTED, BluetoothProfile.STATE_CONNECTING, BluetoothProfile.STATE_CONNECTED, BluetoothProfile.STATE_DISCONNECTING.
Requires NoType:android/Manifest$permission;Href=../../../reference/android/Manifest.permission.html#BLUETOOTH permission to receive.