This reverts commit 29e639e0a495a537c610182ab9b04aed8cf10426.
Reason for revert: found bug accessing variable after it has been moved.
Original change's description:
> Move piggybacking controller from P2PTC to DTLS transport
>
> The DTLS-STUN piggybacking controller is associated with both the DTLS
> transport and the ICE transport (P2PTransportChannel). It turned out to
> be more closely associated with the DTLS transport and requires less
> plumbing when moved there.
>
> The config option to enable the feature remains as part of the ICE
> transport config since the ICE transport does not know its "upstream"
> DTLS transport and hence can not query the config from it.
>
> BUG=webrtc:367395350
>
> Change-Id: Iafd5abd8b65855bcf32bf840414d96513d8e6300
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/375283
> Reviewed-by: Jonas Oreland <jonaso@webrtc.org>
> Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#43823}
Bug: webrtc:367395350
Change-Id: I2d83de8890b0aa230dd9e21cb5ce2eb03c8d3564
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/375861
Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#43824}
4de5839c11