Fixed OOB read in BootControl::isSlotMarkedSuccessful() by checking if "in_slot" is negative Flag: EXEMPT bugfix Test: tested on Husky device Bug: 353516777 Signed-off-by: bgkim <bgkim@google.com> (cherry picked from https://googleplex-android-review.googlesource.com/q/commit:b584b9c7e081d803b32f0ff5f059573dfa6c0a0e) Merged-In: I634c32a8c12403008fe5a724bc447f82931ae9c5 Change-Id: I634c32a8c12403008fe5a724bc447f82931ae9c5