Passpoint-r2: sends IMEI only for the home carrier.

In the spec of R2, it is manatory to send IMEI for the device having
SIM during OSU procedure after making a TLS session with OSU server.
However, it is a device unique identier like wifi factory mac address
Soi, it is better to send IMSI and IMEI for a home carrier that manages
the subscription of mobile.

Bug: 80092273
Test: unit test
Test: tested with R2 AP for OSU procedure
Change-Id: Ib1b6625a7788692a604982c1c57f063cb5ea090e
Signed-off-by: Ecco Park <eccopark@google.com>
3 files changed