[DocsUI M3] Fix "failed to resolve attribute" crash on SDK 30

On SDK 30 and also some other devices, DocsUI crashes when it's open
because it can't resolve "@color/primary" resource, whose value points
to a material color attribute. To fix it, this CL stops using the color
attribute as the value:
* It uses a static color for SDK 30 (this static color is from the same
  color attribute when dynamic color is OFF).
* It uses the mapped system tokens from the color attribute for SDK 31+.

Check the attached bug for the demo.

Bug: 398973028
Test: m DocumentsUIGoogle && manual inspection
Flag: com.android.documentsui.flags.use_material3
Change-Id: I139d623f3c36f63abef9e7421c38691dfc50265f