Revert "Reland: Use unique_ptr and ArrayView in SSLFingerprint"

This reverts commit 47f3240a6621e90a17d92e620ae765c353c87e11.

Reason for revert: Breaks WebRTC roll into Chromium.

Original change's description:
> Reland: Use unique_ptr and ArrayView in SSLFingerprint
> 
> Bug: webrtc:9860
> Change-Id: I550528556aa27050015de29d9d7d99cd9df59ce5
> Reviewed-on: https://webrtc-review.googlesource.com/c/105520
> Reviewed-by: Benjamin Wright <benwright@webrtc.org>
> Reviewed-by: Qingsi Wang <qingsi@webrtc.org>
> Commit-Queue: Steve Anton <steveanton@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#25149}

TBR=steveanton@webrtc.org,qingsi@webrtc.org,benwright@webrtc.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: webrtc:9860
Change-Id: Ib1b5759abf6e79a569ca04b66eabc3021d4c16e4
Reviewed-on: https://webrtc-review.googlesource.com/c/106060
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25173}