sdk=21
constants=com.braintreepayments.api.BuildConfig
packageName=com.braintreepayments.api.dropin

sdk=19
constants=com.braintreepayments.api.BuildConfig
packageName=com.braintreepayments.api.dropin

Reduce Robolectric SDK version to 19
Reduce Robolectric SDK version to 19

Workaround https://github.com/robolectric/robolectric/issues/3202
