Merge "make the notification enqueue rate threshold a setting" into nyc-dev
am: 43c3a7e5a7

* commit '43c3a7e5a781640b862cf6f51805b3823f46fd02':
  make the notification enqueue rate threshold a setting

Change-Id: I3e8c37aead7e1f2d5dc9fc89b72f82294bd16cfe