Revert "Fix an OOB write bug in attp_build_value_cmd"

This reverts commit b927f3fb.

Reason for revert: b/315127634
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:074b81c0b0352f254735b6bbd60b0501ac55096b)
Merged-In: I864ea0727c98d6a20c9c0b59aadcaf6720f7fe01
Change-Id: I864ea0727c98d6a20c9c0b59aadcaf6720f7fe01