audio: Facilitate extension of Module class by vendors am: 57f0dcf7

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2639432



Change-Id: I11be8c69da2f746e973495b58b2d6d4132f25058
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>