audiohal: Support 64-bit audioflinger with 32-bit hal

effect_config_t size depends on the architecture because it
uses pointers. Need to convert it into HIDL structure when
passing to HAL.

Test: build 64-bit af with 32-bit hal server in binderized mode
      run Play Music, apply effects

Change-Id: I16ff9cd3accc00b6cb30f86418880ca5b749fdad