Replace Butter Knife with Android view binding

[UweTrottmann]

https://developer.android.com/topic/libraries/view-binding

Also:

• use custom binding class in single case where layouts are too complicated.
• convert some more code to Kotlin.

[github-actions[bot]]

Test Results

27 tests  ±0   27 :heavy_check_mark: ±0   11s :stopwatch: -2s 12 suites ±0     0 :zzz: ±0  12 files   ±0     0 :x: ±0 

Results for commit 0b2006a7. ± Comparison against base commit 27147b74.

:recycle: This comment has been updated with latest results.