【iOS】Fix timer background state when App is launched from background (#…

…39347)

Summary:
Fixes #38711

## Changelog:

[IOS] [FIXED] - Fix timer background state when App is launched from background

Pull Request resolved: #39347

Test Plan: Please see #38711

Reviewed By: cipolleschi

Differential Revision: D49101979

Pulled By: dmytrorykun

fbshipit-source-id: e25b182539f39e4465fa40e51288d88c68967b31

packages/react-native/React/CoreModules/RCTTiming.mm

@@ -128,6 +128,11 @@ - (void)setup
   _paused = YES;
   _timers = [NSMutableDictionary new];
   _inBackground = NO;
+  RCTExecuteOnMainQueue(^{
+    if (!self->_inBackground && [RCTSharedApplication() applicationState] == UIApplicationStateBackground) {
+      [self appDidMoveToBackground];
+    }
+  });
 
   for (NSString *name in @[
          UIApplicationWillResignActiveNotification,