Cryptography Tool [AES256/CBC/

Aug 4, 2019

- Added AES-256 GCM Mode, choose from drop down
- Increased random entropy

Previously:
- Libraries update
- Migrate to AndroidX
- Recompile for Android Pie API 28 Revision 6
- Optimization to reduce code size
- 64-bit validation checks
- Fix rotation bugs. Thanks to せいなまえ, ありがとうございました
- Reduce redundant code
- Fix Icons for Android 7 and above
- Reduce redundant code
- Lower API level from 19 to 17, support Android 4.4
- Remove reliance on touch screen
- Slight speed improvement