Propagate user_gesture to NavigateParams

For saved tab groups, Chrome needs to know whether a tab was created
by renderer without user gesture so that the same tab will not be
created on all devices and synced to each other. However, user gesture
was set to true in NavigateParams for getting popup focus. This
CL introduces a new field to record the original user gesture that
creates the tab.

Bug: 379670538
Change-Id: Ifd4cf0855885e4a65bf54c44ff61c46c1f5921bb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6231519
Reviewed-by: Elly FJ <ellyjones@chromium.org>
Commit-Queue: Min Qin <qinmin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1416385}