configs: lito: Add button click suppression mixer

Add and enable button click suppression mixer in
headset record path to avoid glitches caused by button
events or removal events during recording usecase.

Change-Id: I923f98295161224a6dab1cfcb0ababcf0cb032b4
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>