Revert "st-hal: force to reset backend for device switch"

This reverts commit 58e1b48d2fcfff36ea2f6214daf60c20f37b92c8.
The concurrent audio recording can be blocked if path is
forced to be closed by VA.

Change-Id: Ib4ec80a221a6debed3954d8bd8028243e3dd8ae2
1 file changed