Revert "Remove unneeded RCTUIManager setAvailableSize call (#7412)" (#…

…7458)

This reverts commit 345344a.

lib/ios/RNNComponentRootView.m

@@ -2,6 +2,20 @@
 
 @implementation RNNComponentRootView
 
+- (instancetype)initWithBridge:(RCTBridge *)bridge
+                    moduleName:(NSString *)moduleName
+             initialProperties:(NSDictionary *)initialProperties
+                  eventEmitter:(RNNEventEmitter *)eventEmitter
+           reactViewReadyBlock:(RNNReactViewReadyCompletionBlock)reactViewReadyBlock {
+    self = [super initWithBridge:bridge
+                      moduleName:moduleName
+               initialProperties:initialProperties
+                    eventEmitter:eventEmitter
+             reactViewReadyBlock:reactViewReadyBlock];
+    [bridge.uiManager setAvailableSize:UIScreen.mainScreen.bounds.size forRootView:self];
+    return self;
+}
+
 - (NSString *)componentType {
     return ComponentTypeScreen;
 }