Adjustment option for WindowManagerLayoutParams.SoftInputMode: set to allow the
window to be resized when an input
method is shown, so that its contents are not covered by the input
method. This can not be combined with
SoftInput.AdjustPan; if
neither of these are set, then the system will try to pick one or
the other depending on the contents of the window. If the window's
layout parameter flags include WindowManagerFlags.Fullscreen, this
value for WindowManagerLayoutParams.SoftInputMode will be ignored; the window will
not resize, but will stay fullscreen.