Return a null Platform.executable and resolvedExecutable on Android

runtime/bin/platform_android.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_ANDROID)
 
 #include "bin/platform.h"
 
 #include <signal.h>  // NOLINT
@@ skipping 63 matching lines @@
   char** result;
   result = reinterpret_cast<char**>(Dart_ScopeAllocate(i * sizeof(*result)));
   for (intptr_t current = 0; current < i; current++) {
     result[current] = environ[current];
   }
   return result;
 }
 
 
 const char* Platform::ResolveExecutablePath() {
-  return File::LinkTarget("/proc/self/exe");
+  return NULL;
 }
 
 
 void Platform::Exit(int exit_code) {
   exit(exit_code);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_ANDROID)