am 1bb663a8: am 26232093: am 5c72b726: Merge "Revert "Use aarch64-linux-android-4.9 for arm64 build (attempt #3)""

* commit '1bb663a8baf25afaab22fbe92130a302fb32814d':
  Revert "Use aarch64-linux-android-4.9 for arm64 build (attempt #3)"