LoAF: Add tracing support for third party detected technology enum.

This adds an enum to `AnimationFrameScriptTimingInfo` with the script
detected by `ThirdPartyScriptDetector`. Unlike the UKM, which records a
bitset of all technologies detected across all scripts run during the
LoAF, this adds an enum of the specific technology detected during each
script, in its `AnimationFrame::Script::Execute` event.

This CL also fixes a bug where script URL and function name were not
recorded for non-Chrometto traces.

Example traces:
WordPress site: https://ui.perfetto.dev/#!/?s=f9825c5826199cdbcec0ccac628531a10f78b97de6955d5e5b08f081e1aebf3b
Google Analytics site: https://ui.perfetto.dev/#!/?s=489ae96dab308f9b0d5ab3749ef6e2bfd69525ae46c2f5d95e8a177063797db8

BUG=343734015

Change-Id: Ie1675167e4abb79532eb3a94d3791f68ceb7e90a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5564793
Commit-Queue: Annie Sullivan <sullivan@chromium.org>
Reviewed-by: Stephen Nusko <nuskos@chromium.org>
Reviewed-by: Michal Mocny <mmocny@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1308178}