Before, if dropDownAlwaysVisible was false,
the soft keyboard height was always taken into
account when calculating the available vertical space for
the AutoCompleteTextView drop-down height.
This meant that the drop-down would never pop over the soft
keyboard when navigating in the drop-down list.
This change makes the drop-down pop over the soft keyboard
when the keyboard is not needed, regardless of the value of
dropDownAlwaysVisible.
Fixes http://b/issue?id=1978935
00a5b99229