Always enable 'delay-agnostic' in APM fuzzer.
Always enable 'delay-agnostic' in APM fuzzer.

This 'fixes' a bug in the non-delay-agnostic code by not fuzzing it.
We plan to always enable the delay-agnostic feature. In Chrome,
delay-agnostic mode is always on:
https://cs.chromium.org/chromium/src/content/renderer/media/stream/media_stream_audio_processor.cc?l=579

Bug: chromium:824638 webrtc:9423
Change-Id: I3d9cac2bc11857fd55549d13c52db4c99dec956c
Reviewed-on: https://webrtc-review.googlesource.com/83984
Commit-Queue: Alex Loiko <999d0b481e5703ad7006f0848e249f8b2c3f29bd@webrtc.org>
Reviewed-by: Sam Zackrisson <b1a93beadfe1d2f7f0106ee02b6ffcdc950aa103@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#23651}
ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc