Don't enable ADB by default on userdebug builds

includes the following commit:

commit c2bb9607e09d899d2ea0a0f87ff43dc2b66068f1
Author: Scott Mertz <scott@cyngn.com>
Date:   Thu Feb 26 10:51:44 2015 -0800

    Enable ADB by default when ro.adb.secure is not 1

    * Property ro.build.type is not part of the default.prop we can't
      use this to decide how to apply adb by default within this function

    Change-Id: Ib3eb24c655353966d64c7148d7530244b628ce94

Change-Id: I33ae5c6f2787017a62e679aa0c28d4b909d45935