Update external card state based on current app

- Before setting and broadcasting READY
state, Telephony checks all supported
UiccCardApplications instead of only the current app state
- Telephony expects all apps reported through
GET_SIM_STATUS should move to READY, however,
this expectation is not correct.
- For example, in the case where a CDMAless MBN is flashed,
and CDMA is not supported, the SIM card reports
a CSIM app. It will remain in DETECTED state and thus,
Telephony never broadcasts the relevant state.
- Use legacy implementation, and broadcast READY state
based on the current app. Broadcast LOADED state once
all apps that have moved to READY have finished loading.

Change-Id: I12ffcc0dc0518f78b6753b8741ccae421e0466bd
CRs-Fixed: 2203384