Import Android SDK Platform-Tools 28 [4423826]

/google/data/ro/projects/android/fetch_artifact \
    --bid 4423826 \
    --target sdk_phone_armv7-sdk_mac \
    sdk-repo-darwin-platform-tools-4423826.zip

Pkg.Revision has been modified to appear as 28.0.0

Change-Id: Idcdeba19b0941b3377a7d8d70aa235bea45a5eb8