Fuzzy search for --start-app

Hi, I really like the flex display mode. It is very helpful when testing windowed apps, much nicer interaction than through the android studio. I use `--start-app` flag to launch my app, but also like to use it to quickly compare with other apps, how they behave. Here comes my idea - support fuzzy search, so that I don't have to copy paste full name or package name, to launch specific 3rd party app, but figure out the best match based on the app name I fat fingered with typos and incompletely :).

Start at the --start-app argument handling and trace how the requested app is resolved and launched. Review the existing app-name and package-name behavior, then determine how fuzzy matching should choose among installed apps for typos and incomplete names. Done means an appropriate matching app can be launched through --start-app.

Written by the indexing model from the issue text.