Add dynamic source default effects

Allows runtime modification of what effects should be default
attached to sources of different types. The core functionality
was already in the AudioPolicyEffects system, this allows
the dynamic modification of the lists.

Bug: 78527120
Test: Builds, manually tested an app adding a source effect,
tested both media on the specified source and on a different source.
Also tested by Android Things integration tests.

Change-Id: I4da15787278c79d80043e172f4f81d3b2a139f44