The current implementation of OEMCrypto_SetDecryptHash gives developers flexibility to use different types of hashes. However, all the implementations we have seen thus far use crc32. Because of this, crc32 should be sufficient and we can refactor OEMCrypto_SetDecryptHash to only use the crc32 hash. Bug: 287706586 Change-Id: I4aaa253b2656dfd9c984f77dfb08fe160b23b47c