No, DummyDroid will not report a download as an installation. This would be against the Google Play Developer TOS anyways and you probably don’t want to risk your account flagged.
No, you can use a system installed one. Just make sure it is running before starting DummyDroid and pressing the “probe device” button.
Open the About dialog ( ☰ Help > About ) and click the “Where am I?” button. It will open a file manager in DummyDroid’s main folder.
Double check the “Versions” tab in the datasheet. Chances are that you were probing a device with disabled Google Play Services.
Yes! Just pass the desired directory with the workspace system property, e.g.:
java -Dworkspace=/some/place/else -jar dummydroid.jar