[vm/ffi] Pointer.asExternalTypedData to extension method - Fix Flutter

Fixes imports (the order of patch files is not defined, so the imports need to be equal in all files).

Change-Id: I2dc16f4930253b25c7ae6ab6b0699581f9e2dd46
Cq-Include-Trybots: luci.dart.try:flutter-engine-linux-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/121428
Commit-Queue: Daco Harkes <dacoharkes@google.com>
Auto-Submit: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>

Author: dcharkes

sdk/lib/_internal/vm/lib/ffi_dynamic_library_patch.dart

@@ -5,7 +5,7 @@
 // All imports must be in all FFI patch files to not depend on the order
 // the patches are applied.
 import "dart:_internal" show patch;
-import 'dart:typed_data' show TypedData;
+import 'dart:typed_data';
 
 DynamicLibrary _open(String name) native "Ffi_dl_open";
 DynamicLibrary _processLibrary() native "Ffi_dl_processLibrary";

sdk/lib/_internal/vm/lib/ffi_native_type_patch.dart

@@ -5,7 +5,7 @@
 // All imports must be in all FFI patch files to not depend on the order
 // the patches are applied.
 import "dart:_internal" show patch;
-import 'dart:typed_data' show TypedData;
+import 'dart:typed_data';
 
 // NativeType is not private, because it is used in type arguments.
 // NativeType is abstract because it not used with const constructors in

sdk_nnbd/lib/_internal/vm/lib/ffi_dynamic_library_patch.dart

@@ -7,7 +7,7 @@
 // All imports must be in all FFI patch files to not depend on the order
 // the patches are applied.
 import "dart:_internal" show patch;
-import 'dart:typed_data' show TypedData;
+import 'dart:typed_data';
 
 DynamicLibrary _open(String name) native "Ffi_dl_open";
 DynamicLibrary _processLibrary() native "Ffi_dl_processLibrary";

sdk_nnbd/lib/_internal/vm/lib/ffi_native_type_patch.dart

@@ -7,7 +7,7 @@
 // All imports must be in all FFI patch files to not depend on the order
 // the patches are applied.
 import "dart:_internal" show patch;
-import 'dart:typed_data' show TypedData;
+import 'dart:typed_data';
 
 // NativeType is not private, because it is used in type arguments.
 // NativeType is abstract because it not used with const constructors in