GlobalActions: Fix airplane mode switch for MSIM

MSIM devices are not reporting state changes for SIM slots without SIMs,
so when toggling airplane mode it would get stuck in the intermediate
state because a phone state callback would never happen.

Now we dynamically add phone state listeners for each active SIM slot.
If there is no active SIM slot, we immediately fall back to the
setting-based behavior. When a subscription update occurs (such as
inserting or removing SIM cards, we'll reinitialize the listener and
use the proper mechanism).

Ticket: CYNGNOS-989

Change-Id: Ifa4f418dd11fda6f67ba31f3847bed225187b95c
Signed-off-by: Roman Birg <roman@cyngn.com>