Add KeyboardSizingCalculator

build.gradle

common/src/org/futo/inputmethod/latin/FoldStateProvider.kt

java/src/org/futo/inputmethod/keyboard/Keyboard.java

java/src/org/futo/inputmethod/keyboard/KeyboardSwitcher.java

java/src/org/futo/inputmethod/keyboard/MainKeyboardView.java

java/src/org/futo/inputmethod/latin/InputView.java

java/src/org/futo/inputmethod/latin/LatinIME.kt

...c/org/futo/inputmethod/latin/uix/KeyboardLayoutPreview.kt

.../org/futo/inputmethod/latin/uix/actions/MemDebugAction.kt

.../src/org/futo/inputmethod/v2keyboard/KeyboardLayoutSet.kt

...g/futo/inputmethod/v2keyboard/KeyboardSizingCalculator.kt

java/src/org/futo/inputmethod/v2keyboard/LayoutEngine.kt

...futo/inputmethod/keyboard/KeyboardLayoutSetTestsBase.java

...inputmethod/keyboard/internal/KeyboardLayoutSetV2Tests.kt