Deprecate the remaining two propagateIfPossible overloads.

We'd missed these years ago.

They won't be deleted, but we recommend migrating off them: Their behavior is less clear, and we are considering some static analysis that would likely apply to the new methods but not the old.

(I notice that there is already [ThrowIfUncheckedKnownChecked](https://errorprone.info/bugpattern/ThrowIfUncheckedKnownChecked). That's a little different, since `propagateIfPossible(knownCheckedException, clazz)` isn't necessarily a no-op. But that could probably would be better written with `throwIfInstanceOf` to make clear that we know we're not rethrowing unchecked exceptions. Anyway, the possible future static analysis includes `throwIfInstanceOf(exception, classThatItCouldNeverBeAnInstanceOf)`, as sometimes seen when accidentally operating on an `ExecutionException` instead of its cause.)

RELNOTES=`base`: Deprecated the remaining two overloads of `Throwables.propagateIfPossible`. They won't be deleted, but we recommend migrating off them.
PiperOrigin-RevId: 613210259

android/guava/src/com/google/common/base/Throwables.java

@@ -162,7 +162,10 @@ public static void propagateIfPossible(@CheckForNull Throwable throwable) {
    *
    * @param throwable the Throwable to possibly propagate
    * @param declaredType the single checked exception type declared by the calling method
+   * @deprecated Use a combination of {@link #throwIfInstanceOf} and {@link #throwIfUnchecked},
+   *     which togther provide the same behavior except that they reject {@code null}.
    */
+  @Deprecated
   @J2ktIncompatible
   @GwtIncompatible // propagateIfInstanceOf
   public static <X extends Throwable> void propagateIfPossible(
@@ -175,13 +178,14 @@ public static <X extends Throwable> void propagateIfPossible(
    * Propagates {@code throwable} exactly as-is, if and only if it is an instance of {@link
    * RuntimeException}, {@link Error}, {@code declaredType1}, or {@code declaredType2}.
    *
-   * <p><b>Discouraged</b> in favor of calling {@link #throwIfInstanceOf} and {@link
-   * #throwIfUnchecked}.
-   *
    * @param throwable the Throwable to possibly propagate
    * @param declaredType1 any checked exception type declared by the calling method
    * @param declaredType2 any other checked exception type declared by the calling method
+   * @deprecated Use a combination of two calls to {@link #throwIfInstanceOf} and one call to {@link
+   *     #throwIfUnchecked}, which togther provide the same behavior except that they reject {@code
+   *     null}.
    */
+  @Deprecated
   @J2ktIncompatible
   @GwtIncompatible // propagateIfInstanceOf
   public static <X1 extends Throwable, X2 extends Throwable> void propagateIfPossible(

guava/src/com/google/common/base/Throwables.java

@@ -162,7 +162,10 @@ public static void propagateIfPossible(@CheckForNull Throwable throwable) {
    *
    * @param throwable the Throwable to possibly propagate
    * @param declaredType the single checked exception type declared by the calling method
+   * @deprecated Use a combination of {@link #throwIfInstanceOf} and {@link #throwIfUnchecked},
+   *     which togther provide the same behavior except that they reject {@code null}.
    */
+  @Deprecated
   @J2ktIncompatible
   @GwtIncompatible // propagateIfInstanceOf
   public static <X extends Throwable> void propagateIfPossible(
@@ -175,13 +178,14 @@ public static <X extends Throwable> void propagateIfPossible(
    * Propagates {@code throwable} exactly as-is, if and only if it is an instance of {@link
    * RuntimeException}, {@link Error}, {@code declaredType1}, or {@code declaredType2}.
    *
-   * <p><b>Discouraged</b> in favor of calling {@link #throwIfInstanceOf} and {@link
-   * #throwIfUnchecked}.
-   *
    * @param throwable the Throwable to possibly propagate
    * @param declaredType1 any checked exception type declared by the calling method
    * @param declaredType2 any other checked exception type declared by the calling method
+   * @deprecated Use a combination of two calls to {@link #throwIfInstanceOf} and one call to {@link
+   *     #throwIfUnchecked}, which togther provide the same behavior except that they reject {@code
+   *     null}.
    */
+  @Deprecated
   @J2ktIncompatible
   @GwtIncompatible // propagateIfInstanceOf
   public static <X1 extends Throwable, X2 extends Throwable> void propagateIfPossible(