ALLJOYN-2141 Changed to make sure the samples build with latest Android SDK

In the past an android project packaged any libraries and jar files found in
the libs folder would automatically be packaged into the resulting apk. A
recent change made it so you must specifically export the dependencies or they
will not be packaged as part of the apk.

Change-Id: I5e7083560436fbfa0aa5d64536a35f386a751730