Audioflinger: add timeout to PatchTrack

Add support for timeout that was only supported by PatchRecord.
This is implemented by moving the timeout and common code in a base
class.

Also remove PatchRecord useless virtual inheritance of RecordTrack.

Test: adb shell audiorecorder --target /data/file.raw
Bug: 111453086
Change-Id: I833148f31a311ca41092be1d7e2d170f086322c5
Signed-off-by: Kevin Rocard <krocard@google.com>