Add missing license file
Add missing license file

The license header in the java file says that this is Apache 2.0
license.

Change-Id: I8cff3d2514d3f527544062b3488517bc59d958ad
Signed-off-by: Edwin Kempin <b444e279ad95fdef4fbdd82c813b624595df204a@sap.com>

GerritCodeReview/plugins_avatars-external