Code adapted for 2.3 release
Compare using interface
Merge pull request #1 from robjperez/use_stream_comparable_interface

Compare using interface
Merge branch 'develop' of https://github.com/opentok/opentok-android-sdk-samples into update_2.3
Merge pull request #20 from marinaserranomontes/update_2.3

Update 2.3