Propagate device bound session observer through //services/network

This CL allows the browser process to inject a device bound session
observer in the NetworkContextParams or
ResourceRequest::TrustedParams. This is completely analogous to the
existing observers for cookie access or shared dictionary access.

NO_IFTTT=TrustedParams is excluded from prefetch: https://source.chromium.org/chromium/chromium/src/+/main:services/network/prefetch_matches.cc;drc=0d7b52b4e799da9280133abae48e073fe5645a35;l=315

Bug: 353774427
Change-Id: I8943e2e4cad5b9f55f79d1b3a29ca296aaea2f3f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6001529
Commit-Queue: Daniel Rubery <drubery@chromium.org>
Reviewed-by: Adam Rice <ricea@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1382687}