Revert "Fix adb hang when subprocess dies early."

This is for http://b/3482112 "adb interactions with device causing test harness failures".

This reverts commit 5066a9b05b90c6440df235427afa07522023121d.

Change-Id: I630bf2e04d2ecf0223bd2af4e87136754ff880d3
12 files changed