Update View with warnings about settings focus

Bug: 229991765
Test: n/a
Change-Id: I76b342bde5fc56eb297a0957028c7ea4e1303a16

core/java/android/view/View.java

@@ -13896,6 +13896,11 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
      * See also {@link #focusSearch(int)}, which is what you call to say that you
      * have focus, and you want your parent to look for the next one.
      *
+     * <p>
+     * <b>Note:</b> Avoid setting accessibility focus. This is intended to be controlled by screen
+     * readers. Apps changing focus can confuse screen readers, so the resulting behavior can vary
+     * by device and screen reader version.
+     *
      * @return Whether this view actually took accessibility focus.
      *
      * @hide
@@ -14734,6 +14739,12 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
      * {@link AccessibilityNodeInfo#ACTION_SCROLL_FORWARD} to nested scrolling parents if
      * {@link #isNestedScrollingEnabled() nested scrolling is enabled} on this view.</p>
      *
+     * <p>
+     * <b>Note:</b> Avoid setting accessibility focus with
+     * {@link AccessibilityNodeInfo#ACTION_ACCESSIBILITY_FOCUS}. This is intended to be controlled
+     * by screen readers. Apps changing focus can confuse screen readers, so the resulting behavior
+     * can vary by device and screen reader version.
+     *
      * @param action The action to perform.
      * @param arguments Optional action arguments.
      * @return Whether the action was performed.

core/java/android/view/accessibility/AccessibilityNodeInfo.java

@@ -4812,6 +4812,9 @@ public class AccessibilityNodeInfo implements Parcelable {
 
         /**
          * Action that gives accessibility focus to the node.
+         * <p>
+         * This is intended to be used by screen readers. Apps changing focus can confuse screen
+         * readers, so the resulting behavior can vary by device and screen reader version.
          */
         public static final AccessibilityAction ACTION_ACCESSIBILITY_FOCUS =
                 new AccessibilityAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);