Don't ignore writing to disk on configuration changes #45
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This PR fixes a subtle bug in which
onSaveInstanceStatemight get called during a configuration change without a corresponding call toonCreateif aFragmentis backgrounded. This would result in a lack of data if you killed the app, returned, and then navigated back. Rather than declining to write data to disk during a configuration change, we'll treat it as the app being in the foreground...this way we still write on a background thread, so we still get the same performance improvement.