Uppercase the auth factor token in input value to match the email casing. (#7094)

src/screens/Login/LoginForm.tsx

···
   const [isProcessing, setIsProcessing] = useState<boolean>(false)
   const [isAuthFactorTokenNeeded, setIsAuthFactorTokenNeeded] =
     useState<boolean>(false)
+  const [isAuthFactorTokenValueEmpty, setIsAuthFactorTokenValueEmpty] =
+    useState<boolean>(true)
   const identifierValueRef = useRef<string>(initialHandle || '')
   const passwordValueRef = useRef<string>('')
   const authFactorTokenValueRef = useRef<string>('')
···
               textContentType="username"
               blurOnSubmit={false} // prevents flickering due to onSubmitEditing going to next field
               onChangeText={v => {
+                setIsAuthFactorTokenValueEmpty(v === '')
                 authFactorTokenValueRef.current = v
               }}
               onSubmitEditing={onPressNext}
···
               accessibilityHint={_(
                 msg`Input the code which has been emailed to you`,
               )}
+              style={[
+                {
+                  textTransform: isAuthFactorTokenValueEmpty
+                    ? 'none'
+                    : 'uppercase',
+                },
+              ]}
             />
           </TextField.Root>
           <Text style={[a.text_sm, t.atoms.text_contrast_medium, a.mt_sm]}>