[Unresolved Reference Fix] Added import for lifecycleScope at MainActivity.kt

Author: eightmoons

Owl/app/src/main/java/com/materialstudies/owl/ui/MainActivity.kt

@@ -20,6 +20,7 @@ import android.os.Bundle
 import android.view.View.GONE
 import android.view.View.VISIBLE
 import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
 import androidx.navigation.Navigation
 import androidx.navigation.ui.setupWithNavController
 import com.materialstudies.owl.R