Get rid of direct reference to KeyboardId from KeyboardLayoutState

KeyboardLayoutState.restore directly loads keyboard using private
methods such as setAlphabetKeyboard and setShifted etc. instaed of
calling public methods such as toggleCapsLock, onPressShift, and
onReleaseShift.

Bug: 5708602
Change-Id: I799f80f1d505ac7bdf17b92b189fc418994bfa2f