fix bug, when LeakCanary was unresolved for oldRelease builds
fix bug, when LeakCanary was unresolved for oldRelease builds

StepicOrg/stepik-android,StepicOrg/stepik-android,StepicOrg/stepic-android,StepicOrg/stepic-android,StepicOrg/stepik-android,StepicOrg/stepic-android