ril: Do not notify of SIM state in plugin

Notifying SIM state from plugin cause race condition with the
notification of the creation of the SIM interface.
mtk: Do not notify of SIM state in plugin

Notifying SIM state from plugin cause race condition with the
notification of the creation of the SIM interface.
rilmodem: Change order of signal emission

Make sure that the existence of the SIM interface is signalled before
the SIM is set as present or of the PIN state.
Merge pull request #129 from alfonsosanchezbeato/fix-sim-signals

Fix order of SIM interface signals