Fix browser env leak after resetting agent

[frankxu2004]

Fixes #1528

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 13 lines in your changes are missing coverage. Please review.

:exclamation: No coverage uploaded for pull request base (main@a60a6a4). Click here to learn what that means.

Files	Patch %	Lines
opendevin/runtime/browser/browser_env.py	0.00%	12 Missing :warning:
opendevin/controller/agent_controller.py	0.00%	1 Missing :warning:

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Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1589   +/-   ##
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  Coverage        ?   61.72%           
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  Files           ?       92           
  Lines           ?     3767           
  Branches        ?        0           
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  Hits            ?     2325           
  Misses          ?     1442           
  Partials        ?        0           

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[rbren]

@frankxu2004 you can probably move this into agent_controller.close() now

[rbren]

Looking good! I think we just need to add a close() call into agent_controller

[frankxu2004]

Added and tested that now after agent re-init (e.g. change config), the browser process will always shutdown correctly. Should be ready @rbren

[rbren]

Thanks Frank!