Increase test timeout to de-flake testes in Google3 (#11643)

Increase test timeout to de-flake testes in Google3

Author: eldhosembabu

FirebaseDynamicLinks/Tests/Unit/FIRDynamicLinkNetworkingTests.m

@@ -26,7 +26,7 @@
 static NSString *const kAPIKey = @"myfakeapikey";
 const NSInteger kJSONParsingErrorCode = 3840;
 static NSString *const kURLScheme = @"gindeeplinkurl";
-static const NSTimeInterval kAsyncTestTimout = 0.5;
+static const NSTimeInterval kAsyncTestTimout = 5.0;
 
 @interface FIRDynamicLinkNetworkingTests : XCTestCase
 

FirebaseDynamicLinks/Tests/Unit/FIRDynamicLinksTest.m

@@ -47,7 +47,7 @@
     @"https://sample.page.link?link=%@&isi=585027354";
 static NSString *const kURLScheme = @"gindeeplinkurl";
 
-static const NSTimeInterval kAsyncTestTimout = 1.0;
+static const NSTimeInterval kAsyncTestTimout = 5.0;
 
 /**
  * This string was generated by percent-encoding the Tactile URL for the Tokyo American Club in