This removes ADB from the Skia checkout and also does some quick
checks to make sure the version of ADB used meets a minimum threshold
Review URL: https://codereview.chromium.org/692513003
This CL is the first step in a series needed to move the
android directory into trunk. After the copy we will update
GYP and DEPS to point to the new location and only then
remove the original directory.
git-svn-id: http://skia.googlecode.com/svn/trunk@8891 2bbb7eff-a529-9590-31e7-b0007b416f81
