Fix app compat dashboard from settings app

Fix an issue due to recent changes tha made the settings app
accidentally categorize non sdk gated changes as targetSdk > -1.

The recent changes made target sdk changes have a '>=' condition instead
of strictly '>', so address that issue as well.

Bug: 172043600
Test: open App Compatibility Changes option in Developer Options
Change-Id: Ic5ee203c5a82ac982164304e3ae399947a39e058