volume_listener: fix incorrect audio hal access

This patch makes the change to first attempt to access the primary audio
hal located in the vendor partition, if the access failed, it will then
attempt to access the system partition to maintain backward
compatibility.

Bug: 37282675
Test: Music playback with max volume using Marlin
Change-Id: Id20cf839608cf1813b00355fff32192c82ff1d5a
Signed-off-by: David Lin <dtwlin@google.com>