Only show outdated SDK warning for android devices
Only show outdated SDK warning for android devices

Summary: This exists to warn people about an incompatibility with old android sdk's, there's no need for the warning on other OS's even if the sdk is old.

Reviewed By: mweststrate

Differential Revision: D19499587

fbshipit-source-id: 5468fffcc0265bb122cf149f49b9af86ddd3c84e

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