fix: disable shadow if needed (#516)

mAppBarLayout is created on every screen change so we need to check if the shadow shouldn't be disabled. This method is needed here since the if clause in setToolbarShadowHidden will return false e.g. when going back to the previous screen.

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

@@ -126,6 +126,10 @@ public View onCreateView(LayoutInflater inflater,
             AppBarLayout.LayoutParams.MATCH_PARENT, AppBarLayout.LayoutParams.WRAP_CONTENT));
     view.addView(mAppBarLayout);
 
+    if (mShadowHidden) {
+      mAppBarLayout.setTargetElevation(0);
+    }
+
     if (mToolbar != null) {
       mAppBarLayout.addView(recycleView(mToolbar));
     }