KTextInputLayout's hasHint() and hasError() doesn't work with Spannable

[Ilya Yakovlev]

Since TextInputLayout.hint and TextInputLayout.error are CharSequence, the KTextInputLayout.hasHint() and KTextInputLayout.hasError() checks may fail if we assign a Spannable instance to this attributes.

Relevant Code:

   fun hasHint(hint: String) {
       view.check(ViewAssertion { view, notFoundException ->
           if (view is TextInputLayout) {
              if (hint != view.hint) {