audiopolicy: capengine: aidl hybrid mode enable

This CL adds the support of hybrid AIDL Audio HAL
and CapEngine relying on legacy vendor XML file.

Bug: 379596346
Test: m

Change-Id: Ic876bf1728b80e6d9e330fc9c0d24858ff8389f8
Signed-off-by: François Gaffie <francois.gaffie@ampere.cars>