Update Snackbar documentation to include LENGTH_INDEFINITE

PiperOrigin-RevId: 203952007

Author: cketcham

lib/java/com/google/android/material/snackbar/BaseTransientBottomBar.java

@@ -302,8 +302,8 @@ protected boolean hasSnackbarStyleAttr() {
   /**
    * Set how long to show the view for.
    *
-   * @param duration either be one of the predefined lengths: {@link #LENGTH_SHORT}, {@link
-   *     #LENGTH_LONG}, or a custom duration in milliseconds.
+   * @param duration How long to display the message. Can be {@link #LENGTH_SHORT}, {@link
+   *     #LENGTH_LONG}, {@link #LENGTH_INDEFINITE}, or a custom duration in milliseconds.
    */
   @NonNull
   public B setDuration(@Duration int duration) {

lib/java/com/google/android/material/snackbar/Snackbar.java

@@ -163,8 +163,8 @@ public boolean isShown() {
    *
    * @param view The view to find a parent from.
    * @param text The text to show. Can be formatted text.
-   * @param duration How long to display the message. Either {@link #LENGTH_SHORT} or {@link
-   *     #LENGTH_LONG}
+   * @param duration How long to display the message. Can be {@link #LENGTH_SHORT}, {@link
+   *     #LENGTH_LONG}, {@link #LENGTH_INDEFINITE}, or a custom duration in milliseconds.
    */
   @NonNull
   public static Snackbar make(
@@ -204,8 +204,8 @@ public static Snackbar make(
    *
    * @param view The view to find a parent from.
    * @param resId The resource id of the string resource to use. Can be formatted text.
-   * @param duration How long to display the message. Either {@link #LENGTH_SHORT} or {@link
-   *     #LENGTH_LONG}
+   * @param duration How long to display the message. Can be {@link #LENGTH_SHORT}, {@link
+   *     #LENGTH_LONG}, {@link #LENGTH_INDEFINITE}, or a custom duration in milliseconds.
    */
   @NonNull
   public static Snackbar make(@NonNull View view, @StringRes int resId, @Duration int duration) {