Make ACTV use all available space if height is FILL_PARENT.

This prevents the drop down from resizing when the keyboard is shown / hidden, and thus fixes the issue where the 4th item in the list could not be selected when in landscape mode.

Bug: 2096394
Change-Id: Id0e687c897a724379073dcfa82de7ce89ae12035

core/java/android/widget/AutoCompleteTextView.java

@@ -1325,7 +1325,7 @@ public class AutoCompleteTextView extends EditText implements Filter.FilterListe
         final int maxHeight = mPopup.getMaxAvailableHeight(
                 getDropDownAnchorView(), mDropDownVerticalOffset, ignoreBottomDecorations);
 
-        if (mDropDownAlwaysVisible) {
+        if (mDropDownAlwaysVisible || mDropDownHeight == ViewGroup.LayoutParams.FILL_PARENT) {
             // getMaxAvailableHeight() subtracts the padding, so we put it back,
             // to get the available height for the whole window
             int padding = 0;