AIDL effect: Initial IEffect interface definition am: 84efa03de3

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2221632

Change-Id: I9c18d00acf7fa5c003c506f1d790eb770abad09f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>