tree 0e5d4bc49cc6299f80a0cccd4ba205d5dfcbb3cb
parent 5cffd971997ace97ebfd2ecb7d43a64c03cf3169
author Elliott Hughes <enh@google.com> 1430440323 -0700
committer Elliott Hughes <enh@google.com> 1430525374 -0700

More adb buffer fixes.

This patch factors out a lot of the basic protocol code: sending OKAY,
sending FAIL, and sending a length-prefixed string.

ADB_TRACE has been non-optional for a long time, so let's just remove
the #ifs.

Also actually build the device tracker test tool (and remove its duplicate).

Bug: http://b/20666660
Change-Id: I6c7d59f18707bdc62ca69dea45547617f9f31fc6
(cherry picked from commit e67f1f87d9b1188ec8617035db7006c37ee7b21e)