Don't allow "enable_root" in adb.

This is a non-standard extension which is causing security
problems. Block it.

(cherry picked from commit ce8bdcac3350d007897f83fe2a421b84a24868f0)

Bug: 11784703
Change-Id: If0ea7b215424629094a929de0b5a9499ef528ef8
1 file changed