chore: update doc comments

Author: demolaf

auth/src/main/java/com/firebase/ui/auth/compose/ui/components/AuthTextField.kt

@@ -39,11 +39,19 @@ import com.firebase.ui.auth.compose.configuration.validators.PasswordValidator
  *
  * **Example usage:**
  * ```kotlin
+ * val emailTextValue = remember { mutableStateOf("") }
+ *
+ * val emailValidator = remember {
+ *     EmailValidator(stringProvider = DefaultAuthUIStringProvider(context))
+ * }
+ *
  * AuthTextField(
- *     value = email,
- *     onValueChange = { email = it },
- *     label = "Email",
- *     validator = EmailValidator()
+ *     value = emailTextValue,
+ *     onValueChange = { emailTextValue.value = it },
+ *     label = {
+ *         Text("Email")
+ *     },
+ *     validator = emailValidator
  * )
  * ```
  *

auth/src/main/java/com/firebase/ui/auth/compose/ui/method_picker/AuthMethodPicker.kt

@@ -29,8 +29,8 @@ import com.firebase.ui.auth.compose.ui.components.AuthProviderButton
  * ```kotlin
  * AuthMethodPicker(
  *     providers = listOf(
- *      AuthProvider.Google(),
- *      AuthProvider.Email(),
+ *         AuthProvider.Google(),
+ *         AuthProvider.Email(),
  *     ),
  *     onProviderSelected = { provider -> /* ... */ }
  * )