Fix autorotation sensor loop being reactivated even when off

The sensor loop was reactivated even if turned off after a wake up
=> consider it disabled also if !mEnabled
+ turn debug mode on in case there's another issue.

Since the current autorotation sensor loop is generating 3-4% cpu eating,
we really need a way to turn it off for good for the moment.
System_server now seems to stay at 0.0% cpu with this change & autorotation off on TF101

Change-Id: I5ed3c95809f6d789222819466dacc625ac2d9f1d
VPN Traffic Amount in Human Readable Format

Normally, VPN traffic amounts are registered in the amount of
bytes that have been transferred over the VPN link.  But that's
ugly, ugly for humans that is.  Most of the time people like
Kilobytes, Megabytes, and Gigabytes; not ugly Bytes.  This
modification changes that so that you get a nice way of
describing the amount of data that has been transferred over
that VPN link.

Signed-off-by: Tom Parkison <thomas.parkison@gmail.com>
Change-Id: I3cef28d63cd98aad833a9d1c9262b162e78a11ab