Move EffectsConfig loading in AudioPolicyEffects to libAudioHal

For HIDL, the EffectsConfig result based on config xml parsing.
For AIDL, the EffectsConfig result based on IFactory interface.

Bug: 261129656
Test: m on aosp_cf_x86_64_phone-userdebug and Pixel 6a
Test: atest audiopolicy_tests
Test: flash to Pixel 6a and test with audio effect enabled

Change-Id: I7ffecbf3e2557a74563f000b514f42c37ef9c4d4