Log only keys of custom signals.

Author: tusharkhandelwal8

FirebaseRemoteConfig/Sources/FIRRemoteConfig.m

@@ -330,9 +330,9 @@ - (void)setCustomSignals:(nonnull NSDictionary<NSString *, NSObject *> *)customS
     if (![newCustomSignals isEqualToDictionary:self->_settings.customSignals]) {
       self->_settings.customSignals = newCustomSignals;
     }
-    // Log the final updated custom signals.
-    FIRLogDebug(kFIRLoggerRemoteConfig, @"I-RCN000078", @"Updated custom signals: %@",
-                newCustomSignals);
+    // Log the keys of the updated custom signals.
+    FIRLogDebug(kFIRLoggerRemoteConfig, @"I-RCN000078", @"Keys of updated custom signals: %@",
+                [newCustomSignals allKeys]);
 
     if (completionHandler) {
       dispatch_async(dispatch_get_main_queue(), ^{

FirebaseRemoteConfig/Sources/RCNConfigSettings.m

@@ -458,9 +458,9 @@ - (NSString *)nextRequestWithUserProperties:(NSDictionary *)userProperties {
                                                        [[NSString alloc]
                                                            initWithData:jsonData
                                                                encoding:NSUTF8StringEncoding]]];
-      // Log the custom signals during fetch.
-      FIRLogDebug(kFIRLoggerRemoteConfig, @"I-RCN000078", @"Fetching with custom signals: %@",
-                  customSignals);
+      // Log the keys of the custom signals sent during fetch.
+      FIRLogDebug(kFIRLoggerRemoteConfig, @"I-RCN000078",
+                  @"Keys of custom signals during fetch: %@", [customSignals allKeys]);
     }
   }
   ret = [ret stringByAppendingString:@"}"];