audio: Update source / sink metadata after opening stream

Since open input / output stream functions in legacy audio
HAL API do not have parameters for source / sink metadata,
make a call to update metadata right after opening a stream
in the default implementation.

Bug: 120859615
Test: audio still works
Change-Id: Ie81f861a024261a1f13fb6aa23976a92658e679c
3 files changed