IMEI information will be overrided by getSummary() and cause second slot IMEI is
oerrided by first slot.
Avoid IMEI is override by first slot information.
Bug: 131124169
Test: Test with dual SIM device and atest
ImeiInfoPreferenceControllerTest, ImeiInfoDialogControllerTest pass
Change-Id: Ia0a028aa0103867f42fff610129cf7ce2d3910b7