(This is a merge of http://go/wvgerrit/138969.)
Provisioning 4.0 on CE CDM requires not only the make & model but the
model year in order to relate a device back to its system ID. This patch
adds model year to the list of properties that partners must provide as
client identification.
As no equivalent field exists for Android, this property is not
provided on Android platforms.
Bug: 206453352
Test: x86-64
Change-Id: I0764d67fec54fa9a0c65074e68f3ee02de1e7820