Don't enable GPS if the requesting app is blacklisted.

This is transparent to the app, it just sees no location callbacks as
before. It just avoids the additional unneeded battery drain.

Change-Id: Iff98bcc3a4ff724aea8763e08b687441bda9ede0
Profile: Filter on NETWORK_STATE_CHANGED instead of SUPPLICANT_STATE_CHANGED

For more reliable network change detection use NETWORK_STATE_CHANGED
instead of SUPPLICANT_STATE_CHANGED

Only set profile when profile actually changed.
Use getWifiSsid instead of getSSID so we dont have to strip double
quotes ourselves, add null pointer exception check because function can
now be called when WiFi is off.

Change-Id: I2b4ea65fdb484edb39a14725c648d9ab0d5d36fb