ServiceUtilities: don't do RECORD_AUDIO check for system server

Only one system server seems to exist across multiple-users; however,
when the primary user is backgrounded, system server loses its
RECORD_AUDIO permission.  Through a number of steps this prevents the
secondary user from starting any services that use the SoundTrigger HAL;
specifically, this was found because it prevents Oslo from functioning
when a secondary user is active.

Bug: 139839188
Test: Oslo use cases pass
Change-Id: Ia0dd5fd3b6992cb18279b81146b35ed040771245
Signed-off-by: Jeffrey Carlyle <jcarlyle@google.com>