fix: add review changes

Author: Skalakid

android/src/main/java/com/swmansion/rnscreens/AutoRemovingFragment.kt

@@ -0,0 +1,38 @@
+package com.swmansion.rnscreens
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+
+/**
+* This class serves as a workaround to https://github.com/software-mansion/react-native-screens/issues/17.
+* 
+* This fragment, when attached to the fragment manager & its state is progressed 
+* to `ON_CREATED`, attempts to detach itself from the parent fragment manager 
+* as soon as possible.
+* 
+* Instances of this type should be created in place of regular screen fragments 
+* when Android restores fragments after activity / application restart.
+* If done so, it's behaviour can prevent duplicated fragment instances,
+* as React will render new ones on activity restart.
+*/
+class AutoRemovingFragment: Fragment() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        // This is the first moment where we have access to non-null parent fragment manager, 
+        // so that we can remove the fragment from the hierarchy. 
+        parentFragmentManager.beginTransaction()
+            .remove(this)
+            .commitAllowingStateLoss()
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? = null
+}

android/src/main/java/com/swmansion/rnscreens/NoOpFragment.kt

@@ -2,14 +2,13 @@ package com.swmansion.rnscreens
 
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentFactory
-import com.swmansion.rnscreens.gamma.helpers.NoOpFragment
 
 class RNScreensFragmentFactory : FragmentFactory() {
     override fun instantiate(classLoader: ClassLoader, className: String): Fragment {
         return if (className.startsWith(BuildConfig.LIBRARY_PACKAGE_NAME)) {
-            NoOpFragment();
+            AutoRemovingFragment();
         } else {
             super.instantiate(classLoader, className)
         }
     }
-}
+}