change version

Change-Id: I94e110b3180dc740a7708984440eda12e32a849f

java/AndroidManifest.xml

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
         package="com.google.android.inputmethod.latin"
         android:versionCode="10"
-        android:versionName="0.18">
+        android:versionName="0.19">
 
     <uses-sdk android:minSdkVersion="8"></uses-sdk>