android-examples: use correct maven group

common-android-app.gradle

@@ -1,6 +1,6 @@
 apply plugin: 'com.android.application'
 
-group   = 'com.jme3'
+group   = 'org.jmonkeyengine'
 version = jmeVersion + '-' + jmeVersionTag
 
 sourceCompatibility = '1.6'
@@ -10,4 +10,4 @@ repositories {
     maven {
         url "http://nifty-gui.sourceforge.net/nifty-maven-repo"
     }
-}
+}