[Database] Migrate to GoogleUtilities's storage container (#12753)

Author: ncooke3

FirebaseDatabase.podspec

@@ -51,6 +51,7 @@ Simplify your iOS development, grow your user base, and monetize more effectivel
   s.dependency 'FirebaseCore', '~> 10.0'
   s.dependency 'FirebaseAppCheckInterop', '~> 10.17'
   s.dependency 'FirebaseSharedSwift', '~> 10.0'
+  s.dependency 'GoogleUtilities/UserDefaults', '~> 7.13'
   s.pod_target_xcconfig = {
     'GCC_C_LANGUAGE_STANDARD' => 'c99',
     'HEADER_SEARCH_PATHS' => '"${PODS_TARGET_SRCROOT}"'

FirebaseDatabase/Sources/Core/FRepoInfo.m

@@ -14,8 +14,10 @@
  * limitations under the License.
  */
 
-#import "FirebaseDatabase/Sources/Core/FRepoInfo.h"
+#import <GoogleUtilities/GULUserDefaults.h>
+
 #import "FirebaseDatabase/Sources/Constants/FConstants.h"
+#import "FirebaseDatabase/Sources/Core/FRepoInfo.h"
 
 @interface FRepoInfo ()
 
@@ -52,7 +54,7 @@ - (instancetype)initWithHost:(NSString *)aHost
         // Get cached internal host if it exists
         NSString *internalHostKey =
             [NSString stringWithFormat:@"firebase:host:%@", _host];
-        NSString *cachedInternalHost = [[NSUserDefaults standardUserDefaults]
+        NSString *cachedInternalHost = [[GULUserDefaults standardUserDefaults]
             stringForKey:internalHostKey];
         if (cachedInternalHost != nil) {
             internalHost = cachedInternalHost;
@@ -81,7 +83,7 @@ - (void)setInternalHost:(NSString *)newHost {
         // Cache the internal host so we don't need to redirect later on
         NSString *internalHostKey =
             [NSString stringWithFormat:@"firebase:host:%@", self.host];
-        NSUserDefaults *cache = [NSUserDefaults standardUserDefaults];
+        GULUserDefaults *cache = [GULUserDefaults standardUserDefaults];
         [cache setObject:internalHost forKey:internalHostKey];
         [cache synchronize];
     }
@@ -93,7 +95,7 @@ - (void)clearInternalHostCache {
     // Remove the cached entry
     NSString *internalHostKey =
         [NSString stringWithFormat:@"firebase:host:%@", self.host];
-    NSUserDefaults *cache = [NSUserDefaults standardUserDefaults];
+    GULUserDefaults *cache = [GULUserDefaults standardUserDefaults];
     [cache removeObjectForKey:internalHostKey];
     [cache synchronize];
 }

Package.swift

@@ -590,6 +590,7 @@ let package = Package(
         "FirebaseAppCheckInterop",
         "FirebaseCore",
         "leveldb",
+        .product(name: "GULUserDefaults", package: "GoogleUtilities"),
       ],
       path: "FirebaseDatabase/Sources",
       exclude: [