[Permissions Policy] update default for focus-without-user-activation
According to discussion1 in webappsec WG and WHATWG, we should set
the default of focus-without-user-activation permissions policy to
EnableForSelf.
Bug: 371112534
Change-Id: I7deb757d0074e1262d07f768e58ea53a99d5faa5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5950528
Reviewed-by: Sanket Joshi sajos@microsoft.com
Commit-Queue: Siye Liu siliu@microsoft.com
Reviewed-by: Ian Clelland iclelland@chromium.org
Cr-Commit-Position: refs/heads/main@{#1374868}