Update Material 3 bottom sheet

[hannah-hyj]

issue:#111448

1. Added a default max width as 640
2. Added a drag handle, the user can also tap it to dismiss bottom sheet in a11y mode. Added drag handle color and size to bottom sheet theme.

Pre-launch Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene wiki page, which explains my responsibilities.
• I read and followed the Flutter Style Guide, including Features we expect every widget to implement.
• I signed the CLA.
• I listed at least one issue that this PR fixes in the description above.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or this PR is test-exempt.
• All existing and new tests are passing.

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[guidezpl]

Nice! Quick comments about docs and relation with enableDrag

[gnprice]

Everything LGTM now except what's covered in existing open threads:
#120855 (comment)
#122445 (comment)

I'll leave @HansMuller and @guidezpl to wrap those up and approve the PR when they think it's ready. Thanks for all your work on this!

[guidezpl]

Nice work! Just minor nits about formatting and docs

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[auto-submit]

auto label is removed for flutter/flutter, pr: 122445, due to - The status or check suite Windows web_tool_tests_1_2 has failed. Please fix the issues identified (or deflake) before re-applying this label.