Bug 1864358 [wpt PR 43101] - Add invoketarget logic for audio and video, a=testonly

Bug 1864358 [wpt PR 43101] - Add invoketarget logic for audio and video, a=testonly

Automatic update from web-platform-tests
Add invoketarget logic for audio and video

This adds logic on how buttons with an invoketarget pointing to an
audio or video element should behave, based on the Invokers proposal.

See explainer section here:
https://open-ui.org/components/invokers.explainer/#defaults.

This implements HandleInvokeInternal on HTMLMediaElement with playpause,
pause, play and mute actions.

Bug: 1497172, 1497173
Change-Id: Id3dc9f36f6bc6a3293e99a9056c0736a9726cdb6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5018214
Reviewed-by: Mason Freed <masonf@chromium.org>
Commit-Queue: Luke <lukewarlow156@gmail.com>
Cr-Commit-Position: refs/heads/main@{#1225369}

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wpt-commits: deba695067b72eeb7b43130466d8bcfa9234ae56
wpt-pr: 43101