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- In the nearby onboarding sharesheet, the device name field is
not autofocused when the page appears. To fix the issue, This CL
adds a call to RequestFocus() when building up the sharesheet's UI.

Bug: 1156395
Change-Id: Ibd3db9a5e0d51521a259b38f70cd741d6c1597c4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2582815
Commit-Queue: Michael Checo <michaelcheco@google.com>
Reviewed-by: James Vecore <vecore@google.com>
Cr-Commit-Position: refs/heads/master@{#837038}