Fixes for a11y selection

- TextView should request focus before performing selection on
  non-editable text, since selection requires focus. On the a11y
  service side, input focus should not matter when selecting
  non-editable text.
- Remove clickable and long-clickable states, since these are present
  due to TextView#setTextIsSelectable.
- Make UI controller changes consistent between SET_SiELECTION and
  SET_TEXT. Using SET_SELECTION means the action mode menu won't pop up
  and the left/right selection handles won't appear. Interactions
  between multiple EditTexts were previously inconsistent

- Delete some obsolete javadoc

Bug: 218357385
Test: builds and install: highlighting is consistent between SET
actions. highlighting works when selecting text in TalkBack, without
the service needing to purposely put input focus,
atest AccessibilityTextTraverssalText

Change-Id: I67986020aa112d45bd670f77b2b415617226c094

core/java/android/view/View.java

@@ -14649,6 +14649,7 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
         int selectionStart;
         int selectionEnd;
         if (extendSelection && isAccessibilitySelectionExtendable()) {
+            prepareForExtendedAccessibilitySelection();
             selectionStart = getAccessibilitySelectionStart();
             if (selectionStart == ACCESSIBILITY_CURSOR_POSITION_UNDEFINED) {
                 selectionStart = forward ? segmentStart : segmentEnd;
@@ -14687,6 +14688,14 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
         return false;
     }
 
+    /**
+     * Prepare for extended selection.
+     * @hide
+     */
+    public void prepareForExtendedAccessibilitySelection() {
+        return;
+    }
+
     /**
      * @hide
      */

core/java/android/widget/TextView.java

@@ -12363,9 +12363,10 @@ public class TextView extends View implements ViewTreeObserver.OnPreDrawListener
         }
 
         // A view should not be exposed as clickable/long-clickable to a service because of a
-        // LinkMovementMethod.
+        // LinkMovementMethod or because it has selectable and non-editable text.
         if ((info.isClickable() || info.isLongClickable())
-                && mMovement instanceof LinkMovementMethod) {
+                && (mMovement instanceof LinkMovementMethod
+                || (isTextSelectable() && !isTextEditable()))) {
             if (!hasOnClickListeners()) {
                 info.setClickable(false);
                 info.removeAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_CLICK);
@@ -12597,11 +12598,9 @@ public class TextView extends View implements ViewTreeObserver.OnPreDrawListener
                         return true;
                     }
                     if (start >= 0 && start <= end && end <= text.length()) {
+                        requestFocusOnNonEditableSelectableText();
                         Selection.setSelection((Spannable) text, start, end);
-                        // Make sure selection mode is engaged.
-                        if (mEditor != null) {
-                            mEditor.startSelectionActionModeAsync(false);
-                        }
+                        hideAccessibilitySelectionControllers();
                         return true;
                     }
                 }
@@ -12695,6 +12694,18 @@ public class TextView extends View implements ViewTreeObserver.OnPreDrawListener
         return handled;
     }
 
+    private void requestFocusOnNonEditableSelectableText() {
+        if (!isTextEditable() && isTextSelectable()) {
+            if (!isEnabled()) {
+                return;
+            }
+
+            if (isFocusable() && !isFocused()) {
+                requestFocus();
+            }
+        }
+    }
+
     private boolean hasSpannableText() {
         return mText != null && mText instanceof Spannable;
     }
@@ -12723,9 +12734,7 @@ public class TextView extends View implements ViewTreeObserver.OnPreDrawListener
     /**
      * Returns the text that should be exposed to accessibility services.
      * <p>
-     * This approximates what is displayed visually. If the user has specified
-     * that accessibility services should speak passwords, this method will
-     * bypass any password transformation method and return unobscured text.
+     * This approximates what is displayed visually.
      *
      * @return the text that should be exposed to accessibility services, may
      *         be {@code null} if no text is set
@@ -13703,6 +13712,13 @@ public class TextView extends View implements ViewTreeObserver.OnPreDrawListener
         return true;
     }
 
+    /**
+     * @hide
+     */
+    public void prepareForExtendedAccessibilitySelection() {
+        requestFocusOnNonEditableSelectableText();
+    }
+
     /**
      * @hide
      */
@@ -13727,8 +13743,12 @@ public class TextView extends View implements ViewTreeObserver.OnPreDrawListener
             Selection.removeSelection((Spannable) text);
         }
         // Hide all selection controllers used for adjusting selection
-        // since we are doing so explicitlty by other means and these
+        // since we are doing so explicitly by other means and these
         // controllers interact with how selection behaves.
+        hideAccessibilitySelectionControllers();
+    }
+
+    private void hideAccessibilitySelectionControllers() {
         if (mEditor != null) {
             mEditor.hideCursorAndSpanControllers();
             mEditor.stopTextActionMode();