Upgrade emulator to emu-master-dev build 3700138 am: 481f1f5b65 am: 8b4d20fc29
am: ae38d735c4

Change-Id: I36d8eeca50efbec8d8a08df6a7c87ad6d9f4c67e
tree: fbcea5a0742160d5f1b52863fe0477fe0d7ba2a7
  1. darwin-x86_64/
  2. linux-x86_64/
  3. .gitignore
  4. NOTICE
  5. README
  6. update_emulator.sh