Can some one help me giving the right url to download java client 2.1.0 jars?
You can get all versions from here
http://search.maven.org/#search|gav|1|g%3A"io.appium"%20AND%20a%3A"java-client"
Is it necessary to include “selendroid jars” in build path?
No need of selendroid jars.
Include Java client jar and selenium jars are sufficient.