Don't add default IMS data profile before SIM loaded

Originally, before SIM loaded, or before TelephonyProvider database
finds any APN settings, default IMS data profile is added.

However, the default IMS data profile is prepared for the case where a SIM/carrier didn't
specify IMS.

The fix is to add the default IMS profile only when the detabase loaded
some data profile; otherwise, it means the SIM hasn't been read properly, in that case we do nothing but wait for SIM to be read.

Bug: 241121008
Test: atest
Change-Id: Ifbad8359db98dadabc754514f6f8038b1415200f