Add logic to check dynamic property to enable/disable LPF

This adds check for system property defined whether to enable or
disable LPF in soc based on WIFI state or BT State during FM turn ON.
Also checks system property flag while DATA state is CONNECTED or
Disconnected  to decide whether to enable or disable LPF in SOC.

Change-Id: I566fc6439c7bbee7326548d92706d0c74b3ff97f