Bug 1937921 [wpt PR 49745] - [Permissions Policy] Fix tab key focus i…

…ssue in frame with disabled focus-without-user-activation, a=testonly

Automatic update from web-platform-tests
[Permissions Policy] Fix tab key focus issue in frame with disabled focus-without-user-activation

According to discussion[1] in webappsec WG and WHATWG, we should allow
tab focus from parent frame into its sub frame when permissions policy
`focus-without-user-activation` is disabled on the iframe.

[1]: w3c/webappsec-permissions-policy#273 (comment)

Bug: 371112534
Change-Id: Iaf88e90fd314b7d0e3d44f88dd837476eb3da8d3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5976473
Reviewed-by: Mustaq Ahmed <mustaqchromium.org>
Reviewed-by: Kent Tamura <tkentchromium.org>
Commit-Queue: Siye Liu <siliumicrosoft.com>
Cr-Commit-Position: refs/heads/main{#1397646}

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wpt-commits: 146b1a57de25072e4747fabec06c65109b3870e3
wpt-pr: 49745

UltraBlame original commit: b8d493d052123bfd3e555aa3e36904d270507f91