Fix Modal to handle in-call status bar

Summary: Changing the Modal's presentation style ensures that UIKit correctly adjusts its bounds when entering/exiting the in-call status bar.

Reviewed By: fkgozali

Differential Revision: D3916167

fbshipit-source-id: a0bea60751744ac082ba6ec38177fb093a8f2be5

React/Views/RCTModalHostView.m

@@ -37,7 +37,7 @@ - (instancetype)initWithBridge:(RCTBridge *)bridge
     _bridge = bridge;
     _modalViewController = [RCTModalHostViewController new];
     UIView *containerView = [UIView new];
-    containerView.autoresizingMask =  UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
+    containerView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
     _modalViewController.view = containerView;
     _touchHandler = [[RCTTouchHandler alloc] initWithBridge:bridge];
     _isPresented = NO;
@@ -148,7 +148,7 @@ - (void)invalidate
 
 - (BOOL)isTransparent
 {
-  return _modalViewController.modalPresentationStyle == UIModalPresentationCustom;
+  return _modalViewController.modalPresentationStyle == UIModalPresentationOverFullScreen;
 }
 
 - (BOOL)hasAnimationType
@@ -158,7 +158,7 @@ - (BOOL)hasAnimationType
 
 - (void)setTransparent:(BOOL)transparent
 {
-  _modalViewController.modalPresentationStyle = transparent ? UIModalPresentationCustom : UIModalPresentationFullScreen;
+  _modalViewController.modalPresentationStyle = transparent ? UIModalPresentationOverFullScreen : UIModalPresentationFullScreen;
 }
 
 - (UIInterfaceOrientationMask)supportedOrientationsMask