Refine EffectProxy logic

To allow create multiple EffectProxy instances for same type
Implement dump with all sub-effects

Bug: 271500140
Test: Enable AIDL and flash to pixel
Test: Play Youtube music with effect on/off
Test: dumpsys media.audio_flinger

Change-Id: I468d7e8712d7b098d869f147a4b40881ef11cabb