Add undo, redo, paste actions

java/res/drawable/clipboard.xml

java/res/drawable/redo.xml

java/res/drawable/undo.xml

java/res/values/strings-uix.xml

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

...src/org/futo/inputmethod/latin/inputlogic/InputLogic.java

java/src/org/futo/inputmethod/latin/uix/Action.kt

java/src/org/futo/inputmethod/latin/uix/ActionBar.kt

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

...src/org/futo/inputmethod/latin/uix/actions/EmojiAction.kt

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