Eliminate loading on app startup

[GiorgioRegni]

It looks like with the preset builder branch, we're getting a long loading prompt when the app is started. It doesn't really makes sense since all the preset data is local on the phone. I tried with a fresh Nexus 5X emulator and it took 84seconds for the app to start!
This should be instant as it used to be since all the default preset and history created preset are local on the phone.

[Rous110508]

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