Updating materialColorSurfaceContainerHighest color access

For any view files applying the WidgetConatinerTheme via widgetsTheme they were incorrectly inheriting themes and skipping the AppTheme provided but only in light mode. In dark mode the WidgetContainerTheme.Dark was correctly inheriting the theme.

To avoid a risky theme update for all widgetsThemes we just modify the color accessor to use @color instead of ?attr as these colors should not be attributes AFAIKT

Bug: b/289305591
Test: Follow repro steps on the bug for smartspace
Change-Id: I26cc3239763f8eac3dfe5f094c6757692f46d1bc