Limit the semantic nodes ID range to 2^16 (#29928)

This PR limits the framework generated semantic node IDs to be smaller than 2^16, this allows to safely generate semantic node in the engine with IDs >= 2^16 avoiding ID collision (which is done in flutter/engine#8250).

packages/flutter/lib/src/semantics/semantics.dart

@@ -1105,9 +1105,17 @@ class SemanticsNode extends AbstractNode with DiagnosticableTreeMixin {
     attach(owner);
   }
 
+
+  // The maximal semantic node identifier generated by the framework.
+  //
+  // The identifier range for semantic node IDs is split into 2, the least significant 16 bits are
+  // reserved for framework generated IDs(generated with _generateNewId), and most significant 32
+  // bits are reserved for engine generated IDs.
+  static const int _maxFrameworkAccessibilityIdentifier = (1<<16) - 1;
+
   static int _lastIdentifier = 0;
   static int _generateNewId() {
-    _lastIdentifier += 1;
+    _lastIdentifier = (_lastIdentifier + 1) % _maxFrameworkAccessibilityIdentifier;
     return _lastIdentifier;
   }