Fix for the invalid Global Proxy Setting

b/11598568

Adding validation for Global Proxy setting before it is
being set.

Proxy is validated at the boot time also to make sure
the value set is valid.

Change-Id: Ib93d24a80af1a329694f07c47bd81dfcc1e1b874
Signed-off-by: Raj Mamadgi <rmamadgi@sta.samsung.com>
3 files changed