TaskLogger cannot be used on builds used for Instrumentation tests

[anas-ambri]

First, thank you very much for taking the effort of developing and maintaining this library!

This issue took me a while to figure out, but, after adding your library, my instrumentation tests failed to execute. (The process would get hung on the command

adb shell am instrument -w -r -e debug false -e class com.example.MyClassTest com.example.test/android.support.test.runner.AndroidJUnitRunner)

While I should have been able to figure out the problem much quicker, I still think this should be mentioned somewhere in the README.

Thanks again for a very useful library!