Merge pull request #1090 from devoncarew/log_stderr

have flutter logs log stderr

packages/flutter_tools/lib/src/device.dart

@@ -850,6 +850,7 @@ class AndroidDevice extends Device {
       'flutter:V',
       'chromium:D',
       'ActivityManager:W',
+      'System.err:W',
       '*:F',
     ]), prefix: 'android: ');
   }