Remove profiler signal handler on shutdown

runtime/vm/thread_interrupter_android.cc

 // Copyright (c) 2013, 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 <sys/syscall.h>  // NOLINT
 
 #include "vm/flags.h"
@@ skipping 41 matching lines @@
   }
   syscall(__NR_tgkill, getpid(), state->id, SIGPROF);
 }
 
 
 void ThreadInterrupter::InstallSignalHandler() {
   SignalHandler::Install(
       ThreadInterrupterAndroid::ThreadInterruptSignalHandler);
 }
 
+
+void ThreadInterrupter::RemoveSignalHandler() {
+  SignalHandler::Remove();
+}
+
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_ANDROID)