Fix tls version

Removed static libraries and added Maven entries
Added latest OkHttp library as source code and forced TLSv1.2
Fixed OkHttp API changes vom v1 to v2
Added OkHttp enforcing to doHttps-Methods (consistency)
Fixed resource reporting for Bricks

Test run: https://jenkins.catrob.at/view/All-Categories/view/Experimental/job/Catroid-Multi-Job-Custom-Branch-RELOADED/480/
https://jenkins.catrob.at/job/CatroidDeviceTest/563/