Eliminate "..." from the key that has no popup mini keyboard automatically

Bug: 4340933
Change-Id: I08bbdee71f4bc2285fd0c1233d284150be61748e
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardView.java b/java/src/com/android/inputmethod/keyboard/KeyboardView.java
index 7dbc790..4086a8e 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardView.java
@@ -630,7 +630,7 @@
         }
 
         // Draw popup hint "..." at the bottom right corner of the key.
-        if (key.hasPopupHint()) {
+        if (key.hasPopupHint() && key.mPopupCharacters != null && key.mPopupCharacters.length > 0) {
             paint.setTextSize(params.mKeyHintLetterSize);
             paint.setColor(params.mKeyHintLabelColor);
             paint.setTextAlign(Align.CENTER);