audiopolicy: capengine: remove unecessary numerical value computing

Bug: 388404113
Test: adb shell cat /vendor/etc/audio_policy_engine_criterion_types.xml
and ensure all input / output devices are listed.

Change-Id: I632b33f366a4000f9fbde836dc86fc7e9f39cd37
Signed-off-by: François Gaffie <francois.gaffie@ampere.cars>