New input functionality for new KeyStoreAPI

[EduardDurech]

• list supports showing saved preferences
• delete supports deleting saved preferences
• encrypt data interface
• decrypt data interface
• generate supports making random alias
• generate supports new quiet, unlocked, invalidate, and authorization flags
• generate supports new purposes and algorithms for Symmetric Ciphers

Fixes https://github.com/termux/termux-api/issues/550, resolves https://github.com/termux/termux-api/issues/246 Requires https://github.com/termux/termux-api/pull/556 and https://github.com/termux/termux-app/pull/3043