Delete gen repository

You don't need to commit the gen repository. This repository generate
a lot of useless changes when you make a commit.

This patch delete the gen repository.

Signed-off-by: Baptiste Robert <baptistex.robert@intel.com>
Clean up of AddFriend activity.

The AddFriend activity don't respect the Android coding style.
The method need to be more atomic.

This patch makes the AddFriend activity compliant with Android
coding style and simplify the method. It also adds some TODO.

Signed-off-by: Baptiste Robert <baptistex.robert@intel.com>