AIDL effect: Add effect AIDL definition

Bug: 238913361
Test: atest VtsHalAudioEffectTargetTest; atest VtsHalAudioEffectFactoryTargetTest
Merged-In: I8cc902df0a396d0703839b8933318a26aab2e38d
Change-Id: I8cc902df0a396d0703839b8933318a26aab2e38d
18 files changed