Buffer transfer and locking workarounds for EVS

These changes get EVS working for 3 frames with validated buffer contents
before HIDL reports a error on the 4th frame when running on Marlin.  More
investigation is required to resolve the HIDL issue.

Test:  Build and run againsgt evs_test
Change-Id: I5096e74aa897e690900620b77a47f79646b0f040