hal: reset echo reference at the end of recording/VoIP sessions

Echo reference is not being reset currently at the end of
recording/VoIP session causing the echo reference not to
work in the further instances of recording/VoIP sessions.
Fix this by resetting echo reference while closing the input
stream used for recording/VoIP usecases.

CRs-Fixed: 717973
Change-Id: I761ba112952951777525b1bf102c9d6ccaad3269