Re-land text selection theme clean up (#99927)

packages/flutter/lib/src/widgets/editable_text.dart

@@ -963,7 +963,7 @@ class EditableText extends StatefulWidget {
   ///
   /// For [CupertinoTextField]s, the value is set to the ambient
   /// [CupertinoThemeData.primaryColor] with 20% opacity. For [TextField]s, the
-  /// value is set to the ambient [ThemeData.textSelectionColor].
+  /// value is set to the ambient [TextSelectionThemeData.selectionColor].
   final Color? selectionColor;
 
   /// {@template flutter.widgets.editableText.selectionControls}

packages/flutter/test/material/snack_bar_test.dart

@@ -752,9 +752,6 @@ void main() {
       buttonTheme: const ButtonThemeData(colorScheme: ColorScheme.dark()),
       toggleButtonsTheme: const ToggleButtonsThemeData(textStyle: TextStyle(color: Colors.black)),
       secondaryHeaderColor: Colors.black,
-      textSelectionColor: Colors.black,
-      cursorColor: Colors.black,
-      textSelectionHandleColor: Colors.black,
       backgroundColor: Colors.black,
       dialogBackgroundColor: Colors.black,
       indicatorColor: Colors.black,
@@ -799,7 +796,6 @@ void main() {
       radioTheme: const RadioThemeData(),
       switchTheme: const SwitchThemeData(),
       progressIndicatorTheme: const ProgressIndicatorThemeData(),
-      useTextSelectionTheme: false,
     );
 
     ThemeData? themeBeforeSnackBar;

packages/flutter/test/material/theme_data_test.dart

@@ -634,9 +634,6 @@ void main() {
       toggleButtonsTheme: const ToggleButtonsThemeData(textStyle: TextStyle(color: Colors.black)),
       buttonColor: Colors.black,
       secondaryHeaderColor: Colors.black,
-      textSelectionColor: Colors.black,
-      cursorColor: Colors.black,
-      textSelectionHandleColor: Colors.black,
       backgroundColor: Colors.black,
       dialogBackgroundColor: Colors.black,
       indicatorColor: Colors.black,
@@ -690,7 +687,6 @@ void main() {
       drawerTheme: const DrawerThemeData(),
       listTileTheme: const ListTileThemeData(),
       fixTextFieldOutlineLabel: false,
-      useTextSelectionTheme: false,
       androidOverscrollIndicator: null,
       extensions: const <Object, ThemeExtension<dynamic>>{},
     );
@@ -735,9 +731,6 @@ void main() {
       toggleButtonsTheme: const ToggleButtonsThemeData(textStyle: TextStyle(color: Colors.white)),
       buttonColor: Colors.white,
       secondaryHeaderColor: Colors.white,
-      textSelectionColor: Colors.white,
-      cursorColor: Colors.white,
-      textSelectionHandleColor: Colors.white,
       backgroundColor: Colors.white,
       dialogBackgroundColor: Colors.white,
       indicatorColor: Colors.white,
@@ -791,7 +784,6 @@ void main() {
       drawerTheme: const DrawerThemeData(),
       listTileTheme: const ListTileThemeData(),
       fixTextFieldOutlineLabel: true,
-      useTextSelectionTheme: true,
       androidOverscrollIndicator: AndroidOverscrollIndicator.stretch,
       extensions: const <Object, ThemeExtension<dynamic>>{
         MyThemeExtensionB: MyThemeExtensionB(textStyle: TextStyle()),
@@ -822,9 +814,6 @@ void main() {
       toggleButtonsTheme: otherTheme.toggleButtonsTheme,
       buttonColor: otherTheme.buttonColor,
       secondaryHeaderColor: otherTheme.secondaryHeaderColor,
-      textSelectionColor: otherTheme.textSelectionTheme.selectionColor,
-      cursorColor: otherTheme.textSelectionTheme.cursorColor,
-      textSelectionHandleColor: otherTheme.textSelectionTheme.selectionHandleColor,
       backgroundColor: otherTheme.backgroundColor,
       dialogBackgroundColor: otherTheme.dialogBackgroundColor,
       indicatorColor: otherTheme.indicatorColor,
@@ -1076,10 +1065,6 @@ void main() {
       'tooltipTheme',
       'expansionTileTheme',
       // DEPRECATED (newest deprecations at the bottom)
-      'useTextSelectionTheme',
-      'textSelectionColor',
-      'cursorColor',
-      'textSelectionHandleColor',
       'accentColor',
       'accentColorBrightness',
       'accentTextTheme',