Prevent OOB read in rw_t4t.cc

Bug: 120865977
Bug: 120274615
Bug: 124462242
Test: Read T4T Tag
Exempt-From-Owner-Approval: Old Owners are all transferred to another BU
Merged-In: Id1b07fa79edabaf27e18a7147d1e7ae66cf3c4b3
Change-Id: Id1b07fa79edabaf27e18a7147d1e7ae66cf3c4b3
(cherry picked from commit 38e3ecb36cb2716cc1e722305b42c2db0d0d01fc)
2 files changed