In sim1 APN settings interface and hot plug out/in sim2, APN information change to sim2's

STEPS TO REPRODUCE:
1. Insert two sim into device, sim1 is CUCC, sim2 is CMCC
2. Goto Settings-Network & Internet-sim1-MobileNetworkSettings-Access Point Names. It shows CUCC APN information
3. Hot plug out sim2
4. Hot plug in sim2, APN information changes to CMCC APN information

EXPECTED RESULTS:
When hot plug out/in sim2, sim1 APN settings interface should still keep its APN information instead of changing to sim2 APN information

Change-Id: I04c769f60ba1686b2c9bebcd07e3a04685979442
Bug: 141087659
Test:In sim1 APN settings interface, hot plug out/in sim2, it shows sim1 APN information all the time, test pass.