Magic Cube

Bugfix in StateSolving upper text - before when we won, and NewRecord dialog was on the screen, and at tis moment we rotated the screen, the uppoer text would revert back to 'Ready?'

UII improvement in StatePattern

Move to AndroidX, target API level 29.

1) Relax requirements as to OpenGL ES ( now only 3.0 required )
2) fix a crash in Solving state

Minor tweaks to the 'Prev' buton in Solving state;
Relax requirements in the Manifest - now only 'android.hardware.faketouch' supporting device is required, i.e. something that supports basic point-click-drag-unclick. No need for full 'android.hardware.touchscreen' thing with its multitouch silliness.

Add a 'withdraw move' button to the Solving UI state.

Each object size now has its own number of levels (not always 18!)

Reorganize UI of the Play state.

Progress implementing RubikCube.retObjectString()

Progress making the Solver state more abstract.