TF-2475 Handle format style rich text in composer

lib/features/composer/presentation/composer_controller.dart

@@ -454,8 +454,7 @@ class ComposerController extends BaseController with DragDropFileMixin {
     richTextMobileTabletController?.richTextController.onCreateHTMLEditor(
       editorApi,
       onEnterKeyDown: _onEnterKeyDown,
-      context: context,
-      onFocus: _onEditorFocusOnMobile,
+      onFocus: () => _onEditorFocusOnMobile(context),
       onChangeCursor: (coordinates) {
         _onChangeCursorOnMobile(coordinates, context);
       },
@@ -1319,7 +1318,6 @@ class ComposerController extends BaseController with DragDropFileMixin {
     log('ComposerController::clearFocus:');
     if (PlatformInfo.isMobile) {
       htmlEditorApi?.unfocus();
-      KeyboardUtils.hideSystemKeyboardMobile();
     }
     FocusScope.of(context).unfocus();
   }
@@ -1508,7 +1506,7 @@ class ComposerController extends BaseController with DragDropFileMixin {
       }
       _closeSuggestionBox();
       if (PlatformInfo.isMobile) {
-        htmlEditorApi?.unfocus();
+        richTextMobileTabletController?.richTextController.hideRichTextView();
       }
     } else {
       switch(prefixEmailAddress) {
@@ -1647,7 +1645,13 @@ class ComposerController extends BaseController with DragDropFileMixin {
     _closeComposerAction();
   }
 
-  void _onEditorFocusOnMobile() {
+  Future<void> _onEditorFocusOnMobile(BuildContext context) async {
+    if (PlatformInfo.isAndroid) {
+      FocusScope.of(context).unfocus();
+      await Future.delayed(
+        const Duration(milliseconds: 300),
+        richTextMobileTabletController?.richTextController.showDeviceKeyboard);
+    }
     _collapseAllRecipient();
     _autoCreateEmailTag();
   }