getActiveSubscriptionInfoList used wrong slection operator

The call to getSubInfo should use ">=0" to find "active" subscriptions.
Previously INVALID_SIM_SLOT_INDEX was -1000 and now its -1 so the
"!=" would return older inactive subscriptons (i.e. -1000 for
SIM_SLOT_INDEX) as well as the truly active subscriptions.

Bug: 18599334
Change-Id: I14e3550d99f8810cab49814160e9e8654d10532d