Added SecurityException check for location access

On a few devices (one of which is the Galaxy S4 Google Play edition), we're seeing crash reports when trying to access location with the following stack trace:

	Caused by: java.lang.SecurityException: "gps" location provider requires ACCESS_FINE_LOCATION permission.
		   at android.os.Parcel.readException(Parcel.java:1431)
		   at android.os.Parcel.readException(Parcel.java:1385)
		   at android.location.ILocationManager$Stub$Proxy.getLastLocation(ILocationManager.java:651)
		   at android.location.LocationManager.getLastKnownLocation(LocationManager.java:1146)
		   at io.segment.android.info.Location.get(Location.java:35)
		   at io.segment.android.info.Location.get(Location.java:1)
		   at io.segment.android.info.InfoManager.build(InfoManager.java:43)
		   at io.segment.android.Analytics.initialize(Analytics.java:364)
		   at io.segment.android.Analytics.initialize(Analytics.java:300)

Our application doesn't require ACCESS_COARSE_LOCATION or ACCESS_FINE_LOCATION permissions, and should be able to function without location according to the Android library documentation:

> You’re not required to include any permission that you’re not comfortable with (except for INTERNET and ACCESS_NETWORK_STATE, which are required). Note that that some analytics services will not work well without their respective permissions.