Updated podspec for internal FirebaseCore header (#13829)

Author: paulb777

FirebaseCore/Sources/FIROptionsInternal.h

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#import "FirebaseCore/Sources/Public/FirebaseCore/FIROptions.h"
+#import <FirebaseCore/FIROptions.h>
 
 /**
  * This header file exposes the initialization of FirebaseOptions to internal use.

FirebaseFirestoreInternal.podspec

@@ -45,6 +45,7 @@ Google Cloud Firestore is a NoSQL document database built for automatic scaling,
   # that "quick open" by filename in Xcode will continue to work.
   s.source_files = [
     'FirebaseCore/Extension/*.h',
+    'FirebaseCore/Sources/FIROptionsInternal.h',
     'Firestore/Source/Public/FirebaseFirestore/*.h',
     'Firestore/Source/**/*.{m,mm}',
     'Firestore/Protos/nanopb/**/*.cc',

scripts/check_imports.swift

@@ -102,6 +102,7 @@ private func checkFile(_ file: String, logger: ErrorLogger, inRepo repoURL: URL,
   let isPrivate = file.range(of: "/Sources/Private/") != nil ||
     // Delete when FirebaseInstallations fixes directory structure.
     file.range(of: "Source/Library/Private/FirebaseInstallationsInternal.h") != nil ||
+    file.range(of: "FirebaseCore/Sources/FIROptionsInternal.h") != nil ||
     file.range(of: "FirebaseCore/Extension") != nil
 
   // Treat all files with names finishing on "Test" or "Tests" as files with tests.