Add autofill support to ios text input plugin (#17493)

Author: LongCatIsLooong

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

@@ -534,6 +534,11 @@ - (void)updateEditingClient:(int)client withState:(NSDictionary*)state {
                               arguments:@[ @(client), state ]];
 }
 
+- (void)updateEditingClient:(int)client withState:(NSDictionary*)state withTag:(NSString*)tag {
+  [_textInputChannel.get() invokeMethod:@"TextInputClient.updateEditingStateWithTag"
+                              arguments:@[ @(client), @{tag : state} ]];
+}
+
 - (void)updateFloatingCursor:(FlutterFloatingCursorDragState)state
                   withClient:(int)client
                 withPosition:(NSDictionary*)position {

shell/platform/darwin/ios/framework/Source/FlutterTextInputDelegate.h

@@ -30,6 +30,7 @@ typedef NS_ENUM(NSInteger, FlutterFloatingCursorDragState) {
 @protocol FlutterTextInputDelegate <NSObject>
 
 - (void)updateEditingClient:(int)client withState:(NSDictionary*)state;
+- (void)updateEditingClient:(int)client withState:(NSDictionary*)state withTag:(NSString*)tag;
 - (void)performAction:(FlutterTextInputAction)action withClient:(int)client;
 - (void)updateFloatingCursor:(FlutterFloatingCursorDragState)state
                   withClient:(int)client

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

@@ -36,9 +36,6 @@
 @end
 
 /** A range of text in the buffer of a Flutter text editing widget. */
-#if FLUTTER_RUNTIME_MODE == FLUTTER_RUNTIME_MODE_DEBUG
-FLUTTER_EXPORT
-#endif
 @interface FlutterTextRange : UITextRange <NSCopying>
 
 @property(nonatomic, readonly) NSRange range;
@@ -71,6 +68,7 @@ FLUTTER_EXPORT
 @property(nonatomic, getter=isSecureTextEntry) BOOL secureTextEntry;
 @property(nonatomic) UITextSmartQuotesType smartQuotesType API_AVAILABLE(ios(11.0));
 @property(nonatomic) UITextSmartDashesType smartDashesType API_AVAILABLE(ios(11.0));
+@property(nonatomic, copy) UITextContentType textContentType API_AVAILABLE(ios(10.0));
 
 @property(nonatomic, assign) id<FlutterTextInputDelegate> textInputDelegate;