Don't send empty composing texts.

Bug: 13160467
Change-Id: I5e3204ac8aaa18fe9219cc6b564b832ab6cf94fc
diff --git a/java/src/com/android/inputmethod/latin/inputlogic/InputLogic.java b/java/src/com/android/inputmethod/latin/inputlogic/InputLogic.java
index 8b795b8..1156c77 100644
--- a/java/src/com/android/inputmethod/latin/inputlogic/InputLogic.java
+++ b/java/src/com/android/inputmethod/latin/inputlogic/InputLogic.java
@@ -936,7 +936,11 @@
             } else {
                 mWordComposer.processEvent(inputTransaction.mEvent);
             }
-            mConnection.setComposingText(getTextWithUnderline(mWordComposer.getTypedWord()), 1);
+            if (mWordComposer.isComposingWord()) {
+                mConnection.setComposingText(getTextWithUnderline(mWordComposer.getTypedWord()), 1);
+            } else {
+                mConnection.commitText("", 1);
+            }
             inputTransaction.setRequiresUpdateSuggestions();
         } else {
             if (mLastComposedWord.canRevertCommit()) {