Integration lib version discrepancies

[TWiStErRob]

At this time:

• on 3.0 branch the okhttp lib has 1.4.0 code 10.
• on master branch the okhttp lib has 2.0.0 code 8.

As far as I know version codes in Android must be incremental, however we can probably get away with it in libraries. Though it would be a nice gesture to keep it consistent.
The code could also be a calculated combination, something like:

major*10000 + minor*100 + patch

So 1.4.0=10400 and 2.0.0=20000. This accounts for any future releases with two digits in any of the versions.

Alternative we can just lock all the android lib version codes to 0 or 1 because it doesn't matter anyway?

[sjudd]

Actually I think 0 is the right call, no need to set it if it isn't used, and it's one less thing to screw up with each release.