Layout change in support card and support dialog

1. Wrap the support_disclaimer_content by scrollview.
2. Change the layout in support_escalation_options using layout_weight.
3. Add styles in layout-sw300dp and layout-sw400dp

The target scope is between 300dp->400dp, so I add the default style
in sw400dp and changed style in sw300dp to cover it.

Bug: 31399419
Test: Visual
Change-Id: I117acb0c5b992bea2cded6cd48749c4ed7b04488