Update libphonenumber dependency

Signed-off-by: Francis Galiegue <fgaliegue@gmail.com>
Update gradle wrapper

Signed-off-by: Francis Galiegue <fgaliegue@gmail.com>
Update copyright on all files

Signed-off-by: Francis Galiegue <fgaliegue@gmail.com>
2.2.0

Signed-off-by: Francis Galiegue <fgaliegue@gmail.com>
Announce 2.2.0

Signed-off-by: Francis Galiegue <fgaliegue@gmail.com>