fixes to make wifi priority work

Change-Id: Ia2832f8469808975ddd5d0f5104f9b9dc9ef6f9c
Wi-Fi: Pass default country code to driver

This patch reverts partially the change http://review.cyanogenmod.org/#/c/28918/8, and
passing the default country code ("GB") to the driver instead of null.

Change-Id: I7d7115155a0a52261931ffaddaf35f316d095800
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Remove possible leak when exception occurred.

nameUtf8 is not released after exception.
In addtion, Fix code going down after ThrowException.

Change-Id: Id46e8ed55acd98e982ae532f7da2c0c48847f010
Clear loaders array after they are destroyed.

See change Ia577caecbacb226a3ce525a01a66283efb6ba754 for details.

Change-Id: I9f07eeceaa3829f71008e6f6a38ab849095bd69c
Signed-off-by: Roman Mazur <mazur.roman@gmail.com>