Change shutdown and restart dialog's title, message and positive button text

Ref-Id: Ib3566d92a134b5c54a8c13d87301c4ab489c8381
Change-Id: I76108e306a5e907f1d79d44ee36353292b257f22
support change fonts

Change-Id: Ibd515c02093cf2b6c2ff9de599f168c6d5662d9c