fix type errors for input_device and file_detector (#14459)

Co-authored-by: Sri Harsha <[email protected]>

Author: Delta456

py/selenium/webdriver/common/actions/input_device.py

@@ -35,5 +35,5 @@ def add_action(self, action: Any) -> None:
     def clear_actions(self) -> None:
         self.actions = []
 
-    def create_pause(self, duration: int = 0) -> None:
+    def create_pause(self, duration: float = 0) -> None:
         pass

py/selenium/webdriver/remote/file_detector.py

@@ -50,3 +50,4 @@ def is_local_file(self, *keys: AnyKey) -> Optional[str]:
         with suppress(OSError):
             if Path(file_path).is_file():
                 return file_path
+        return None