Disable the profiler when a debugger is attached

runtime/vm/thread_interrupter_android.cc

Index: runtime/vm/thread_interrupter_android.cc
diff --git a/runtime/vm/thread_interrupter_android.cc b/runtime/vm/thread_interrupter_android.cc
index 30bd440cb64aed94840e042d29e753954cc24c7a..af066c3ce6e83f29ac53b41145dee11345243abc 100644
--- a/runtime/vm/thread_interrupter_android.cc
+++ b/runtime/vm/thread_interrupter_android.cc
@@ -47,10 +47,15 @@ class ThreadInterrupterAndroid : public AllStatic {
 };
 
 
+bool ThreadInterrupter::IsDebuggerAttached() {
+  return false;
+}
+
+
 void ThreadInterrupter::InterruptThread(OSThread* thread) {
   if (FLAG_trace_thread_interrupter) {
-    OS::Print("ThreadInterrupter interrupting %p\n",
-              reinterpret_cast<void*>(thread->id()));
+    OS::PrintErr("ThreadInterrupter interrupting %p\n",
+                 reinterpret_cast<void*>(thread->id()));
   }
   int result = syscall(__NR_tgkill, getpid(), thread->id(), SIGPROF);
   ASSERT((result == 0) || (result == ESRCH));