Test Drive Unlimited 2 was developed by Eden Games and published by Atari, releasing in 2011 for Windows, Xbox 360, and PlayStation 3. The game was ambitious—featuring a massive open-world recreation of Ibiza and Oahu, dynamic weather, day/night cycles, thousands of miles of roads, and deep social integration (clubs, trading cars, even buying virtual houses).
No legitimate TDU2 exists for Android. However, or CarX Street offer similar open-world racing and car collection. For the true TDU2 experience on mobile, you would need to use PC streaming (Steam Link, Moonlight) from a PC running the actual game, or play the PS3/Xbox 360 versions via console emulation—which requires a very powerful device and is legally complex.
I understand you're looking for information about Test Drive Unlimited 2 on Android, but it's important to clarify a few key facts first.