Update to error_prone 2.0.19 am: 0fc37229d7
am: 67a0564a4e

Change-Id: I83de37258721bc7ece501ed48e4a82ccd08cd0c2
tree: 7222688f0efe074990c4b21715d8ff0c541b06cc
  1. checkerframework/
  2. error_prone/
  3. javac/
  4. jFormatString/