Translate text by top

We were centralizing without considering that there could be some
additional translation passed to DynamicDrawableSpan#draw

Test: atest DynamicDrawableSpanTest
Fixes: 154489406
Change-Id: I9615f478d1962b2d6fd54123fc391554073f5bf1

core/java/android/text/style/DynamicDrawableSpan.java

@@ -166,7 +166,7 @@ public abstract class DynamicDrawableSpan extends ReplacementSpan {
         if (mVerticalAlignment == ALIGN_BASELINE) {
             transY -= paint.getFontMetricsInt().descent;
         } else if (mVerticalAlignment == ALIGN_CENTER) {
-            transY = (bottom - top) / 2 - b.getBounds().height() / 2;
+            transY = top + (bottom - top) / 2 - b.getBounds().height() / 2;
         }
 
         canvas.translate(x, transY);