Roll android tools deps after cleaning up assist changes
Roll android tools deps after cleaning up assist changes

The preview sources are now removed from android_tools. Also
remove the proguard flags changes.

BUG=512264

Review URL: https://codereview.chromium.org/1394023006

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#357208}

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