Really remove io support when dart:io is unsupported.

runtime/bin/platform_android.cc

Index: runtime/bin/platform_android.cc
diff --git a/runtime/bin/platform_android.cc b/runtime/bin/platform_android.cc
index de60960488540c9c1f973380cc9eccc64e0d9e03..1f29b21d0c50f7e185f7ce43777f92e76135b008 100644
--- a/runtime/bin/platform_android.cc
+++ b/runtime/bin/platform_android.cc
@@ -5,7 +5,6 @@
 #include "platform/globals.h"
 #if defined(TARGET_OS_ANDROID)
 
-#include "bin/file.h"
 #include "bin/platform.h"
 
 #include <signal.h>  // NOLINT
@@ -13,10 +12,16 @@
 #include <unistd.h>  // NOLINT
 
 #include "bin/fdutils.h"
+#include "bin/file.h"
 
 namespace dart {
 namespace bin {
 
+const char* Platform::executable_name_ = NULL;
+char* Platform::resolved_executable_name_ = NULL;
+int Platform::script_index_ = 1;
+char** Platform::argv_ = NULL;
+
 bool Platform::Initialize() {
   // Turn off the signal handler for SIGPIPE as it causes the process
   // to terminate on writing to a closed pipe. Without the signal