I simulate removing the network at the end of the test.

Sometimes, the test fails because a openvpn tries to close a bad file
descriptor.

The tests say they failed, but it's because the adb server is no longer
able to communicate with the emulator due to switching network
connectivity off (and being the adb server connected to a local tcp port
of the emulator, this port dissapears once connectivity is down).

To see if all tests passed, take a look at the logcat.
Once tests are finished, issue "adb kill-server" from the development
machine, and then "adb logcat".

I've also fixed a simple test that wasn't letting the suite to finish
correctly.

The test that checked how many providers were listed was failing
because this test added dev.bm.net, which was already present in the
debug apk, so no new provider was added.

This return to "app" instead of "bitmask_android" is due to this reading: https://developer.android.com/sdk/installing/studio-build.html#projectStructure
I'll have to tweak the final apk name in build.gradle.

This way, gradle commands generate apks correctly named.