GoogleDataTransport: deprecated API conditions (#6697)

* GoogleDataTransport: deprecated API conditions

* Version bump

* use `TARGET_OS_IOS`

* changelog

* changelog

* style

Author: maksymmalyhin

GoogleDataTransport.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'GoogleDataTransport'
-  s.version          = '7.5.0'
+  s.version          = '7.5.1'
   s.summary          = 'Google iOS SDK data transport.'
 
   s.description      = <<-DESC

GoogleDataTransport/CHANGELOG.md

@@ -1,4 +1,7 @@
-# Unreleased
+# v7.5.1
+- Fix deprecation warning for iOS 12.0 and higher projects. (#6682)
+
+# v7.5.0
 - Legacy pre Xcode 10 compatibility checks removed. (#6486)
 - `GDTCORDirectorySizeTracker` crash fixed. (#6540)
 

GoogleDataTransport/GDTCORLibrary/GDTCORPlatform.m

@@ -127,7 +127,7 @@ GDTCORNetworkMobileSubtype GDTCORNetworkMobileSubTypeMessage() {
   if (networkCurrentRadioAccessTechnologyDict.count) {
     networkCurrentRadioAccessTechnology = networkCurrentRadioAccessTechnologyDict.allValues[0];
   }
-#else   // TARGET_OS_MACCATALYST
+#else  // TARGET_OS_MACCATALYST
   if (@available(iOS 12.0, *)) {
     NSDictionary<NSString *, NSString *> *networkCurrentRadioAccessTechnologyDict =
         networkInfo.serviceCurrentRadioAccessTechnology;
@@ -137,7 +137,9 @@ GDTCORNetworkMobileSubtype GDTCORNetworkMobileSubTypeMessage() {
       networkCurrentRadioAccessTechnology = networkCurrentRadioAccessTechnologyDict.allValues[0];
     }
   } else {
+#if TARGET_OS_IOS && __IPHONE_OS_VERSION_MIN_REQUIRED < 120000
     networkCurrentRadioAccessTechnology = networkInfo.currentRadioAccessTechnology;
+#endif  // TARGET_OS_IOS && __IPHONE_OS_VERSION_MIN_REQUIRED < 120000
   }
 #endif  // TARGET_OS_MACCATALYST
   if (networkCurrentRadioAccessTechnology) {
@@ -147,9 +149,9 @@ GDTCORNetworkMobileSubtype GDTCORNetworkMobileSubTypeMessage() {
   } else {
     return GDTCORNetworkMobileSubtypeUNKNOWN;
   }
-#else
+#else   // TARGET_OS_IOS
   return GDTCORNetworkMobileSubtypeUNKNOWN;
-#endif
+#endif  // TARGET_OS_IOS
 }
 
 NSString *_Nonnull GDTCORDeviceModel() {