patches.py: Set umask for all commands
Ensure that the umask is set correctly before performing the
operations of apply-patches, update-patch, remove-patch,
update-next-patches, and finalize-next-patches.
Bug: T401672
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Ensure that the umask is set correctly before performing the
operations of apply-patches, update-patch, remove-patch,
update-next-patches, and finalize-next-patches.
Bug: T401672