audioflinger: Forward stream parameters to downstream patches

When passing parameters to immediate output streams also check
if there are any downstream patch threads that need to receive
these parameters.

Added AudioFlinger::forwardParametersToDownstreamPatches_l
method, similar to existing broacastParametersToRecordThreads_l.

Bug: 63901775
Test: make
Change-Id: I83229fd6f4890e5e69a40d568d1c3e1eebed6504