Allow Android to function in single SIM mode when modem is in DSDS

Remove checks and exceptions in Android that were put in place
to avoid modem being in multi-SIM mode when Android is in
single SIM mode.

Test: Boot up device with modem in dual SIM and android in single SIM
Bug: 122119277
Merged-In: I073840a10ff8b3c77160f83279aeb9b6650d05e0
Change-Id: I073840a10ff8b3c77160f83279aeb9b6650d05e0