Revert "remove invalid dependency on ektorp"

This reverts commit 8144c0dc59a1e9901192e636104125ffd689656c.
This fixes the issue where it was giving an error:

Could not find org.ektorp:org.ektorp:1.2.3.
        Required by:
            CouchChatAndroid:CBLiteConsole:unspecified > CouchChatAndroid:CBLiteEktorp:unspecified

I don't know why this line is needed, but it does now match the CBLIteEktorp build.gradle file.