Rename RNScreen to RNScreens to stay consistent (#27)

android/src/main/java/com/swmansion/rnscreens/RNScreensPackage.java

@@ -9,7 +9,7 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
-public class RNScreenPackage implements ReactPackage {
+public class RNScreensPackage implements ReactPackage {
   @Override
   public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {
     return Collections.emptyList();

android/src/main/java/com/swmansion/rnscreens/ScreenContainer.java

@@ -42,7 +42,7 @@ public class ScreenContainer extends ViewGroup {
       mFragmentManager = ((FragmentActivity) activity).getSupportFragmentManager();
     } else {
       throw new IllegalStateException(
-              "In order to use RNScreen components your app's activity need to extend ReactFragmentActivity or ReactCompatActivity");
+              "In order to use RNScreens components your app's activity need to extend ReactFragmentActivity or ReactCompatActivity");
     }
   }
 

android/src/main/java/com/swmansion/rnscreens/ScreenContainerViewManager.java

@@ -24,7 +24,7 @@ public class ScreenContainerViewManager extends ViewGroupManager<ScreenContainer
   @Override
   public void addView(ScreenContainer parent, View child, int index) {
     if (!(child instanceof Screen)) {
-      throw new IllegalArgumentException("Attempt attach child that is not of type RNScreen");
+      throw new IllegalArgumentException("Attempt attach child that is not of type RNScreens");
     }
     parent.addScreen((Screen) child, index);
   }