➕ Adding DroidSansFallback font to TCPDF

Modification proposed by @purplegrape with PR #49, many thanks !

setup/licenses/community-licences.xml

@@ -1708,6 +1708,30 @@ Public License instead of this License.  But first, please read
 **********************************************************************</pre>]]>
     </text>
   </license>
+  <license>
+    <product>Droid Sans Fallback font</product>
+    <author>The Android Open Source Project</author>
+    <license_type>Apache License 2.0</license_type>
+    <text><![CDATA[<pre>Copyright (C) 2008 The Android Open Source Project
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+##########
+
+This directory contains the fonts for the platform. They are licensed
+under the Apache 2 license.</pre>]]>
+    </text>
+  </license>
   <license>
     <product>fraphael</product>
     <author>Chris Scott</author>