Google vision, regex, surfaceView

[max-prokofjev]

0. Learn how Activities and Intent work in android projects
1. Create button in main menu to call scanActivity(google vision OCR)
2. Test yourself how google vision works
3. learn how surfaceView works and find a way how to implement rectangular brackets so that only in that space recognition works(not full screen for better UX and comfort)
4. Test how text processing works with google vision API and modify or upgrade it
5. If it works, add success message to user when text has been validated and create receipt object