Audio Effect : Add base implementation of commandImpl method

Removing code repeatation and moving this method to base class.
Effect implementations can override enable, disable and reset methods.

Bug: 305866207
Test: atest --test-mapping hardware/interfaces/audio/aidl/vts:presubmit
Change-Id: Iceb7ad51185d6f6bd2b6d70a5a1dd51e7bd37276