Lazily initialize the RTPSenderVideoFrameTransformerDelegate's
encoder_queue_ on either OnTransformedFrame() or TransformFrame(), to
allow apps to write to an encoded insertable stream's writable before
reading from its readable.
Bug: chromium:1393373
Change-Id: I08f11682fa142884b575bb207d7d7044e80bbb9c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/284921
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Tony Herre <herre@google.com>
Auto-Submit: Tony Herre <herre@google.com>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38728}
893c0e449d