[py] Fix possible TypeError in expected conditions (#15891)

Co-authored-by: Corey Goldberg <1113081+cgoldberg@users.noreply.github.com>

Author: ShauryaDusht

py/selenium/webdriver/support/expected_conditions.py

@@ -428,6 +428,8 @@ def text_to_be_present_in_element_value(
  def _predicate(driver: WebDriverOrWebElement):
  try:
  element_text = driver.find_element(*locator).get_attribute("value")
+ if element_text is None:
+ return False
  return text_ in element_text
  except StaleElementReferenceException:
  return False