Cleanup headers files for BtLE classes

Some spacing and reordering for readability and remove unnecessary
friend relationships.

Change-Id: I9d2c9eb78713b94999829bc0a58824d476a2dbd4
Reviewed-by: Nedim Hadzic <nhadzic@blackberry.com>
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>