Merge changes from topics "2019-11-12-schuffelen-ivserver", "2019-11-12-schuffelen-record-audio", "2019-11-12-schuffelen-vsoc-lib", "2019-11-13-schuffelen-socket-forward"
* changes:
Delete vsoc support libraries and tests
Remove header dependencies on vsoc_lib
Break build dependencies on vsoc_lib
Delete the stream_audio host binary
Remove references to stream_audio.
Delete the record_audio host binary
Delete the legacy audio hal
Delete vsoc, vsoc-future hwcomposers
Delete guest/hals/gralloc but not /legacy
Delete ivserver
Remove {assemble,launch,run}_cvd ivserver references
Delete socket_forward_proxy
Delete references to socket_forward_proxy