This change is copied from the widevine CL: https://widevine-internal-review.googlesource.com/#/c/10163/ Because the OEMCrypto_PST_Report is sent as a signed block to the server, it needs to be a fixed, platform independent, size. This CL adds the packed attribute to the structure, which reduces its size from 56 bytes to 47 bytes. Change-Id: I2bae058b7eb0ac54ba9fad355f3d85ddc2cd4a58