[Android] Fix time zone handling when setting the date in provision_devices.
[Android] Fix time zone handling when setting the date in provision_devices.

BUG=

Review-Url: https://codereview.chromium.org/1980723002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#393695}

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