Effect Offload Proxy for effects offload

Effect Proxy abstracts the sub effects to the upper layers.
It has the following functionalities:
- creation and release of sub effects
- routing the effect commands and process to the appropriate sub effect

Bug: 8174034.

Change-Id: I22d8136636048e7fe8f8807cbc6e348ffa200a22
Signed-off-by: jpadmana <rpadmanaban.jayashree@gmail.com>