Re-enable running instrumentation tests in CI

[mustafa01ali]

With the update to Gradle 3.0 and API 26, all builds in CI are failing with the following error -

$ echo no | android create avd --force -n test -t android-19 --abi armeabi-v7a

Error: Target id is not valid. Use 'android list targets' to get the target ids.

The command "echo no | android create avd --force -n test -t android-19 --abi armeabi-v7a" failed and exited with 1 during .

A similar issue was reported to Travis back in May 2017, but they haven't looked into it till now. After trying a lot of different ideas with no luck, we decided to disable running instrumented tests to publish an update.

Moving forward, we need to either find a way to make it work again or migrate this project to a better CI.