audio: capEngine: Allow built-in strategies to omit the 'id' attribute

For builtin strategy, the "id" must be set from the name.
These builtin strategies must be provisionned in the structure file.
The parameters associated to these strategies will use their legacy
name (whereas vendor strategies are referred with "vx_<id>").

Bug: 390449625
Test: m

Change-Id: Ie03ca7860fab84f9a384c3723458702ab173c4c4
Signed-off-by: François Gaffie <francois.gaffie@ampere.cars>