audio: changet the period size of VoIP Record

Change the period size of VoIP Record to 20ms.
Otherwise it will apply fast capture.
Fast capture timestamps are not supported yet.

Bug: 196912510
Test: Build pass
Change-Id: I6434a7596880712efa7cbfa03b3480efb5e2c2aa
(cherry picked from commit 47a8acc5f1ff1bd62d1cb8df96f3f1b48be14049)
4 files changed