configs: Reduce offload pausetimeout to 3 secs

- On split a2dp audio is received on remote device
  for 10secs after triggering pause of offload session

- Offload session is tear down only after 10secs which
  resulted silence audio stream to BT till pause timeout

- Reduce pausetimeout to 3 secs to inline split & non-split
  a2dp behaviour

Change-Id: Ieded332df3e043c017fc5f054b64d28e6fb72e90