Fix information in the README

[IgorGanapolsky]

Hello,
your README states:

the test suite will not report that the Test Butler app is not installed, instead it will skip the test.

However, I am continually getting this exception:
java.lang.IllegalStateException: ButlerService is not started!

When trying to use TestButler without the companion APK.

[drewhannay]

You're see this even when trying to use TestButler from an @BeforeClass or @AfterClass method?

[IgorGanapolsky]

@drewhannay Yes

[drewhannay]

Very interesting. More info would be useful. What version of the Testing Support Library are you using? How are you running the tests?

I believe the behavior I've seen is that error does not show up in the junit test report when an exception happens in @BeforeClass or @AfterClass

[IgorGanapolsky]

I am using:
androidTestImplementation 'com.linkedin.testbutler:test-butler-library:1.3.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.0'

If you omit androidTestUtil 'com.linkedin.testbutler:test-butler-app:1.3.1@apk' from your gradle script, you will see this error in @BeforeClass and @afterclass