Fix for Windows - Backslashes is the escape

Fix for Windows Backslashes is the escape character and will result in an invalid path in settings.gradle
  [issue:23176]( facebook/react-native#23176)
  i found this fix in past commit (0.57) and i submit again.

Changelog:
----------

[Android] [Fixed] - Fix for Windows Backslashes is the escape character and will result in an invalid path in settings.gradle

Test Plan:
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in windows run react-native link and start error,  Backslashes is the escape character and will result in an invalid path in settings.gradle

packages/cli/src/link/android/patches/makeSettingsPatch.js

@@ -10,6 +10,8 @@
 const path = require('path');
 const normalizeProjectName = require('./normalizeProjectName');
 
+const isWin = process.platform === 'win32';
+
 module.exports = function makeSettingsPatch(
   name,
   androidConfig,
@@ -20,7 +22,15 @@ module.exports = function makeSettingsPatch(
     androidConfig.sourceDir
   );
   const normalizedProjectName = normalizeProjectName(name);
-
+  /*
+   * Fix for Windows
+   * Backslashes is the escape character and will result in
+   * an invalid path in settings.gradle
+   * https://github.com/facebook/react-native/issues/23176
+   */
+  if (isWin) {
+    projectDir = projectDir.replace(/\\/g, '/');
+  }
   return {
     pattern: '\n',
     patch: