Added packagingOptions so RxJava 1 and RxJava 2 can work on the same project
Added packagingOptions so RxJava 1 and RxJava 2 can work on the same project

kaushikgopal/Android-RxJava,jmfayard/RxJava-Android-Samples,TonyTangAndroid/RxJava-Android-Samples,kaushikgopal/RxJava-Android-Samples,marukami/RxJava-Android-Samples,kaushikgopal/RxJava-Android-Samples,TonyTangAndroid/RxJava-Android-Samples