Remove @Beta from uncontroversial Futures methods:

- `submit`
- `submitAsync`
- `scheduleAsync`
- `nonCancellationPropagating`
- `inCompletionOrder`

I did also add a TODO to potentially make the return type of `scheduleAsync` more specific in the future. However, to the best of my knowledge, no one has ever asked for this. (That's not surprising: `ScheduledFuture` isn't any more useful than `Future` unless you're implementing a `ScheduledExecutorService`, and even then, access to its timeout is unavoidably racy.) Plus, should we ever need to do it, we can do it compatibly by injecting a bridge method with the old signature.

(I didn't see any discussion of the return type in the API Review doc or the CL review thread. It probably just didn't come up, or maybe we all independently concluded that it wasn't worth the trouble, given that `MoreExecutors.listeningDecorator(ScheduledExecutorService)` is a bit of a pain? But I'm guessing `scheduleAsync` would be easier.)

RELNOTES=`util.concurrent`: Removed `@Beta` from `Futures` methods: `submit`, `submitAsync`, `scheduleAsync`, `nonCancellationPropagating`, `inCompletionOrder`.
PiperOrigin-RevId: 416139691

android/guava/src/com/google/common/util/concurrent/Futures.java

@@ -179,7 +179,6 @@ private Futures() {}
    * @throws RejectedExecutionException if the task cannot be scheduled for execution
    * @since 28.2
    */
-  @Beta
   public static <O extends @Nullable Object> ListenableFuture<O> submit(
       Callable<O> callable, Executor executor) {
     TrustedListenableFutureTask<O> task = TrustedListenableFutureTask.create(callable);
@@ -194,7 +193,6 @@ private Futures() {}
    * @throws RejectedExecutionException if the task cannot be scheduled for execution
    * @since 28.2
    */
-  @Beta
   public static ListenableFuture<@Nullable Void> submit(Runnable runnable, Executor executor) {
     TrustedListenableFutureTask<@Nullable Void> task =
         TrustedListenableFutureTask.create(runnable, null);
@@ -208,7 +206,6 @@ private Futures() {}
    * @throws RejectedExecutionException if the task cannot be scheduled for execution
    * @since 23.0
    */
-  @Beta
   public static <O extends @Nullable Object> ListenableFuture<O> submitAsync(
       AsyncCallable<O> callable, Executor executor) {
     TrustedListenableFutureTask<O> task = TrustedListenableFutureTask.create(callable);
@@ -222,9 +219,9 @@ private Futures() {}
    * @throws RejectedExecutionException if the task cannot be scheduled for execution
    * @since 23.0
    */
-  @Beta
   @GwtIncompatible // java.util.concurrent.ScheduledExecutorService
   @SuppressWarnings("GoodTime") // should accept a java.time.Duration
+  // TODO(cpovirk): Return ListenableScheduledFuture?
   public static <O extends @Nullable Object> ListenableFuture<O> scheduleAsync(
       AsyncCallable<O> callable,
       long delay,
@@ -743,7 +740,6 @@ public Void call() throws Exception {
    *
    * @since 15.0
    */
-  @Beta
   public static <V extends @Nullable Object> ListenableFuture<V> nonCancellationPropagating(
       ListenableFuture<V> future) {
     if (future.isDone()) {
@@ -871,7 +867,6 @@ protected void afterDone() {
    *
    * @since 17.0
    */
-  @Beta
   public static <T extends @Nullable Object> ImmutableList<ListenableFuture<T>> inCompletionOrder(
       Iterable<? extends ListenableFuture<? extends T>> futures) {
     ListenableFuture<? extends T>[] copy = gwtCompatibleToArray(futures);

guava/src/com/google/common/util/concurrent/Futures.java

@@ -181,7 +181,6 @@ private Futures() {}
    * @throws RejectedExecutionException if the task cannot be scheduled for execution
    * @since 28.2
    */
-  @Beta
   public static <O extends @Nullable Object> ListenableFuture<O> submit(
       Callable<O> callable, Executor executor) {
     TrustedListenableFutureTask<O> task = TrustedListenableFutureTask.create(callable);
@@ -196,7 +195,6 @@ private Futures() {}
    * @throws RejectedExecutionException if the task cannot be scheduled for execution
    * @since 28.2
    */
-  @Beta
   public static ListenableFuture<@Nullable Void> submit(Runnable runnable, Executor executor) {
     TrustedListenableFutureTask<@Nullable Void> task =
         TrustedListenableFutureTask.create(runnable, null);
@@ -210,7 +208,6 @@ private Futures() {}
    * @throws RejectedExecutionException if the task cannot be scheduled for execution
    * @since 23.0
    */
-  @Beta
   public static <O extends @Nullable Object> ListenableFuture<O> submitAsync(
       AsyncCallable<O> callable, Executor executor) {
     TrustedListenableFutureTask<O> task = TrustedListenableFutureTask.create(callable);
@@ -224,8 +221,8 @@ private Futures() {}
    * @throws RejectedExecutionException if the task cannot be scheduled for execution
    * @since 28.0
    */
-  @Beta
   @GwtIncompatible // java.util.concurrent.ScheduledExecutorService
+  // TODO(cpovirk): Return ListenableScheduledFuture?
   public static <O extends @Nullable Object> ListenableFuture<O> scheduleAsync(
       AsyncCallable<O> callable, Duration delay, ScheduledExecutorService executorService) {
     return scheduleAsync(callable, toNanosSaturated(delay), TimeUnit.NANOSECONDS, executorService);
@@ -237,9 +234,9 @@ private Futures() {}
    * @throws RejectedExecutionException if the task cannot be scheduled for execution
    * @since 23.0
    */
-  @Beta
   @GwtIncompatible // java.util.concurrent.ScheduledExecutorService
   @SuppressWarnings("GoodTime") // should accept a java.time.Duration
+  // TODO(cpovirk): Return ListenableScheduledFuture?
   public static <O extends @Nullable Object> ListenableFuture<O> scheduleAsync(
       AsyncCallable<O> callable,
       long delay,
@@ -776,7 +773,6 @@ public Void call() throws Exception {
    *
    * @since 15.0
    */
-  @Beta
   public static <V extends @Nullable Object> ListenableFuture<V> nonCancellationPropagating(
       ListenableFuture<V> future) {
     if (future.isDone()) {
@@ -904,7 +900,6 @@ protected void afterDone() {
    *
    * @since 17.0
    */
-  @Beta
   public static <T extends @Nullable Object> ImmutableList<ListenableFuture<T>> inCompletionOrder(
       Iterable<? extends ListenableFuture<? extends T>> futures) {
     ListenableFuture<? extends T>[] copy = gwtCompatibleToArray(futures);