Rename analyzer_experimental to analyzer.

pkg/analyzer/lib/src/generated/java_core.dart

 library java.core;
 
 import "dart:math" as math;
 
 class JavaSystem {
   static int currentTimeMillis() {
     return (new DateTime.now()).millisecondsSinceEpoch;
   }
 
   static void arraycopy(List src, int srcPos, List dest, int destPos, int length) {
@@ skipping 476 matching lines @@
     if (!_matches.moveNext()) {
       return false;
     }
     _match = _matches.current;
     return true;
   }
   String group(int i) => _match[i];
   int start() => _match.start;
   int end() => _match.end;
 }