Fix Multi user avater View overlap privacy dot

Move system_icons_super_container_margin_start to parent ViewGroup
to ensure both multi_user_avatar system_icons_container can share
the padding

Test: make and check visual, enable multi user and check keyguard
Bug: 194324044
Change-Id: Iab2803dfb2b609b98eb8053e3b81bd6731857a2b