Tweak vertical gap of Emoji palette. DO NOT MERGE

cherrypick of I8163568a9d7f9d321148001e161c672f78796c96

Bug: 11140087
Change-Id: Ifd28f3017a8cf568a8c4a1045811564a129d85b7

java/src/com/android/inputmethod/keyboard/internal/DynamicGridKeyboard.java

@@ -184,12 +184,12 @@ public class DynamicGridKeyboard extends Keyboard {
 
     private int getKeyY0(final int index) {
         final int row = index / mColumnsNum;
-        return row * mVerticalStep;
+        return row * mVerticalStep + mVerticalGap / 2;
     }
 
     private int getKeyY1(final int index) {
         final int row = index / mColumnsNum + 1;
-        return row * mVerticalStep;
+        return row * mVerticalStep + mVerticalGap / 2;
     }
 
     @Override