DO NOT MERGE Part of fix for libmedia OOB write anywhere

Clarify that decrypt destination is not a pointer for
secure case.

b/23223325

Change-Id: I642dcf790a9eb9e32175f3e0d8f040c82228e3ac
(cherry picked from commit ed555d70d80964f40563d89a4e6d6a80f83f4b89)
1 file changed