Move PlaybackThread::Track::writeFrames to PatchRecord

This code logically belongs to PatchRecord because it emulates
obtaining recorded data from a client.

Test: make
Merged-In: Icba4e33d9d0ca57e6ad964aaf3209e7db766f284
Change-Id: Icba4e33d9d0ca57e6ad964aaf3209e7db766f284
3 files changed