Revert "p2p: add getters for local and remote ice parameters"

This reverts commit cff7428afb1c3ba12b679d9f7794108cdb18279c.

Reason for revert: Breaks downstream project

Original change's description:
> p2p: add getters for local and remote ice parameters
>
> Also makes the tests use those rather than individual accessors.
>
> BUG=webrtc:367395350
>
> Change-Id: I2cfef501957eed73cbb2e87c5c7306dc58247b41
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/383963
> Reviewed-by: Jonas Oreland <jonaso@webrtc.org>
> Commit-Queue: Philipp Hancke <phancke@meta.com>
> Reviewed-by: Harald Alvestrand <hta@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#44368}

Bug: webrtc:367395350
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I7e4711631c9bfad459e660f79c9dae43f6537490
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/386040
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Auto-Submit: Fredrik Solenberg <solenberg@webrtc.org>
Reviewed-by: Jonas Oreland <jonaso@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#44370}