update

Author: LongCatIsLooong

ci/licenses_golden/licenses_flutter

@@ -867,6 +867,7 @@ FILE: ../../../flutter/shell/platform/darwin/ios/framework/Source/FlutterPluginA
 FILE: ../../../flutter/shell/platform/darwin/ios/framework/Source/FlutterTextInputDelegate.h
 FILE: ../../../flutter/shell/platform/darwin/ios/framework/Source/FlutterTextInputPlugin.h
 FILE: ../../../flutter/shell/platform/darwin/ios/framework/Source/FlutterTextInputPlugin.mm
+FILE: ../../../flutter/shell/platform/darwin/ios/framework/Source/FlutterTextInputPluginTest.m
 FILE: ../../../flutter/shell/platform/darwin/ios/framework/Source/FlutterUmbrellaImport.m
 FILE: ../../../flutter/shell/platform/darwin/ios/framework/Source/FlutterView.h
 FILE: ../../../flutter/shell/platform/darwin/ios/framework/Source/FlutterView.mm

shell/platform/darwin/ios/framework/Source/FlutterTextInputPlugin.mm

@@ -261,6 +261,9 @@ - (NSRange)clampSelection:(NSRange)range forText:(NSString*)text {
 #pragma mark - UIResponder Overrides
 
 - (BOOL)canBecomeFirstResponder {
+  // Only the currently focused input field can
+  // become the first responder. This prevents iOS
+  // from changing focus by itself.
   return _textInputClient != 0;
 }