[Android] Fix Slider semantics double tap behaviors (#56452)

## Description

Android fix for [[A11y] Double Tap brings the Slider thumb to the center of the widget.](flutter/flutter#156427). Similar to [the iOS engine fix](#56427).

Slider widget doesn't define a Semantics.onTap handler, so a double-click while in accessibility mode defaults to a regular tap down event to which _RenderSlider reacts by changing the slider value.

Adding a onTap callback on the framework side was tried in flutter/flutter#157601 but it breaks one accessibility guideline test, see flutter/flutter#157601 (comment)). 

See flutter/flutter#157601 (comment) for the reasoning to make the change at the engine level.

## Related Issue

Android fix for [[A11y] Double Tap brings the Slider thumb to the center of the widget.](flutter/flutter#156427).

## Tests

Adds 1 test.

Author: bleroux

shell/platform/android/io/flutter/view/AccessibilityBridge.java

@@ -802,6 +802,15 @@ public AccessibilityNodeInfo createAccessibilityNodeInfo(int virtualViewId) {
         result.addAction(AccessibilityNodeInfo.ACTION_CLICK);
         result.setClickable(true);
       }
+    } else {
+      // Prevent Slider to receive a regular tap which will change the value.
+      //
+      // This is needed because it causes slider to select to middle if it
+      // doesn't have a semantics tap.
+      if (semanticsNode.hasFlag(Flag.IS_SLIDER)) {
+        result.addAction(AccessibilityNodeInfo.ACTION_CLICK);
+        result.setClickable(true);
+      }
     }
     if (semanticsNode.hasAction(Action.LONG_PRESS)) {
       if (semanticsNode.onLongPressOverride != null) {

shell/platform/android/test/io/flutter/view/AccessibilityBridgeTest.java

@@ -2165,6 +2165,21 @@ public void SetSourceAndPackageNameForAccessibilityEvent() {
     verify(mockEvent).setSource(eq(mockRootView), eq(123));
   }
 
+  @Test
+  public void itAddsClickActionToSliderNodeInfo() {
+    AccessibilityBridge accessibilityBridge = setUpBridge();
+
+    TestSemanticsNode testSemanticsNode = new TestSemanticsNode();
+    testSemanticsNode.addFlag(AccessibilityBridge.Flag.IS_SLIDER);
+    TestSemanticsUpdate testSemanticsUpdate = testSemanticsNode.toUpdate();
+    testSemanticsUpdate.sendUpdateToBridge(accessibilityBridge);
+    AccessibilityNodeInfo nodeInfo = accessibilityBridge.createAccessibilityNodeInfo(0);
+
+    assertEquals(nodeInfo.isClickable(), true);
+    List<AccessibilityNodeInfo.AccessibilityAction> actions = nodeInfo.getActionList();
+    assertTrue(actions.contains(AccessibilityNodeInfo.AccessibilityAction.ACTION_CLICK));
+  }
+
   AccessibilityBridge setUpBridge() {
     return setUpBridge(null, null, null, null, null, null);
   }