Fix license filename case

Author: gspencergoog

ci/licenses_golden/licenses_flutter

@@ -2539,7 +2539,7 @@ ORIGIN: ../../../flutter/shell/platform/darwin/macos/framework/Source/Accessibil
 ORIGIN: ../../../flutter/shell/platform/darwin/macos/framework/Source/AccessibilityBridgeMac.mm + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/darwin/macos/framework/Source/AccessibilityBridgeMacTest.mm + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterAppDelegate.mm + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterAppDelegate_internal.h + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterAppDelegate_Internal.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterApplication.mm + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterBackingStore.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterBackingStore.mm + ../../../flutter/LICENSE
@@ -5055,7 +5055,7 @@ FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/Accessibilit
 FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/AccessibilityBridgeMac.mm
 FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/AccessibilityBridgeMacTest.mm
 FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterAppDelegate.mm
-FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterAppDelegate_internal.h
+FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterAppDelegate_Internal.h
 FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterApplication.mm
 FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterBackingStore.h
 FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterBackingStore.mm

shell/platform/darwin/macos/framework/Source/FlutterAppDelegate.mm

@@ -21,6 +21,9 @@ - (NSString*)applicationName;
 
 @implementation FlutterAppDelegate
 
+// TODO(stuartmorgan): Implement application lifecycle forwarding to plugins here, as is done
+// on iOS. Currently macOS plugins don't have access to lifecycle messages.
+
 - (instancetype)init {
   if (self = [super init]) {
     _terminationHandler = nil;