Import Android SDK Platform-Tools 27 [4301809]

/google/data/ro/projects/android/fetch_artifact \
    --bid 4301809 \
    --target sdk_phone_armv7-sdk_mac \
    sdk-repo-darwin-platform-tools-4301809.zip

Pkg.Revision has been modified to appear as 27.0.0

Change-Id: I426c6b9d59f2cb7923a4858a3605ea385738ab3f