VAG DPF lite

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2.21.4
- added DTTC engine (thanks Graziano)
- corrected landscape layout error
- changed name from FREE to LITE to follow Google rules

2.20.4
- created new group 15 for engine CXHA and ECU sw 6186 (post dieselgate)
- added CSUD engine to group 9 (thanks Daniel)
- minor improvements

2.19.4
- first support to Android 10
- added CDUD engine to group 11 (thanks Raivo)

2.18.4
- added engine DGTD tested by users