Fixed incorrect android package name for character sample in AndroidManifest.xml

samples/character/android/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-        package="org.gameplay3d.sample_mesh"
+        package="org.gameplay3d.sample_character"
         android:versionCode="1"
         android:versionName="1.0">