Filter TYPE_REMOTE sims

They receive a slot index of -1, which is also the reserved id for
invalid sims. Exclude them from the list of active subscriptions
for display.

Test: atest KeyguardUpdateMonitorTest
Fixes: 392718286
Flag: EXEMPT bugfix
Change-Id: Id9d5ba93a6f7e618e8452de650348ef9f1be673f