Remove option to paste rich text from Android EditText context menu (facebook#38189)

Summary:
Text is copy pasted as rich text on Android TextInput instead of Plain Text.

### What is the root cause of that problem?

Android EditText and iOS UITextField/UITextView have different copy/paste behavior.
- Android TextInput copies/pastes rich text
- iOS UITextField copies/pastes plain text.

| iOS (react-native)   | Android (react-native) |
| ----------- | ----------- |
| <video src="https://user-images.githubusercontent.com/24992535/249170968-8fde35f0-a53c-4c5c-bd89-ee822c08eadf.mp4" width="350" />      | <video src="https://user-images.githubusercontent.com/24992535/249171968-bf0915a0-4060-4586-b267-7c2b463d76f6.mov" width="350" />       |

### What changes do you think we should make in order to solve the problem?

The issue is a bug in react-native facebook#31442:

1) The JavaScript TextInput and ReactEditText Android state are not in sync
2) The TextInput Android Native state over-rides the JavaScript state.
3) onChangeText passes a plain text string to JavaScript, not rich text (text with spans and styles).

More info at Expensify/App#21411 (comment)

The solution consists of:

1) **Over-riding onTextContextMenuItem in ReactEditText to copy/paste plain text instead of rich-text** (https://stackoverflow.com/a/45319485/7295772).
2) **Removing the `Paste as plaintext` option from the insert and selection context menu**

fixes facebook#31442

## Changelog:

[ANDROID] [FIXED] - Remove option to paste rich text from Android EditText context menu

Pull Request resolved: facebook#38189

Test Plan:
#### Reproducing the issue on Android

https://user-images.githubusercontent.com/24992535/249185416-76f8a687-1aca-4dc9-9abe-3d73d6e2893c.mp4

#### Fixing the issue on Android
Sourcecode https://github.com/fabriziobertoglio1987/text-input-cursor-flickering-android/blob/fix-copy-paste/app/src/main/java/com/example/myapplication/CustomEditText.java

https://user-images.githubusercontent.com/24992535/249486339-95449bb9-71b6-430c-8207-f5672f034fa9.mp4

#### Testing the solution on React Native

https://github.com/Expensify/App/assets/24992535/b302237b-99e5-44a2-996d-8bc50bbbc95c

Reviewed By: mdvacca

Differential Revision: D47824730

Pulled By: NickGerleman

fbshipit-source-id: 35525e7d52e664b0f78649d23941262ee45a00cd

Author: fabOnReact

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactEditText.java

@@ -10,6 +10,8 @@
 import static com.facebook.react.uimanager.UIManagerHelper.getReactContext;
 import static com.facebook.react.views.text.TextAttributeProps.UNSET;
 
+import android.content.ClipData;
+import android.content.ClipboardManager;
 import android.content.Context;
 import android.graphics.Color;
 import android.graphics.Paint;
@@ -28,8 +30,11 @@
 import android.text.method.KeyListener;
 import android.text.method.QwertyKeyListener;
 import android.util.TypedValue;
+import android.view.ActionMode;
 import android.view.Gravity;
 import android.view.KeyEvent;
+import android.view.Menu;
+import android.view.MenuItem;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.accessibility.AccessibilityNodeInfo;
@@ -181,6 +186,35 @@ public boolean performAccessibilityAction(View host, int action, Bundle args) {
           }
         };
     ViewCompat.setAccessibilityDelegate(this, editTextAccessibilityDelegate);
+    ActionMode.Callback customActionModeCallback =
+        new ActionMode.Callback() {
+          /*
+           * Editor onCreateActionMode adds the cut, copy, paste, share, autofill,
+           * and paste as plain text items to the context menu.
+           */
+          @Override
+          public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+            menu.removeItem(android.R.id.pasteAsPlainText);
+            return true;
+          }
+
+          @Override
+          public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+            return true;
+          }
+
+          @Override
+          public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+            return false;
+          }
+
+          @Override
+          public void onDestroyActionMode(ActionMode mode) {}
+        };
+    setCustomSelectionActionModeCallback(customActionModeCallback);
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+      setCustomInsertionActionModeCallback(customActionModeCallback);
+    }
   }
 
   @Override
@@ -269,6 +303,37 @@ public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
     return inputConnection;
   }
 
+  /*
+   * Called when a context menu option for the text view is selected.
+   * React Native replaces copy (as rich text) with copy as plain text.
+   */
+  @Override
+  public boolean onTextContextMenuItem(int id) {
+    if (id == android.R.id.paste) {
+      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+        id = android.R.id.pasteAsPlainText;
+      } else {
+        ClipboardManager clipboard =
+            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
+        ClipData previousClipData = clipboard.getPrimaryClip();
+        if (previousClipData != null) {
+          for (int i = 0; i < previousClipData.getItemCount(); i++) {
+            final CharSequence text = previousClipData.getItemAt(i).coerceToText(getContext());
+            final CharSequence paste = (text instanceof Spanned) ? text.toString() : text;
+            if (paste != null) {
+              ClipData clipData = ClipData.newPlainText(null, text);
+              clipboard.setPrimaryClip(clipData);
+            }
+          }
+          boolean actionPerformed = super.onTextContextMenuItem(id);
+          clipboard.setPrimaryClip(previousClipData);
+          return actionPerformed;
+        }
+      }
+    }
+    return super.onTextContextMenuItem(id);
+  }
+
   @Override
   public void clearFocus() {
     setFocusableInTouchMode(false);