[DocsUI M3] Update icons for filter bar chips

As spec the icons in the filter bar chips should use a
new set of icons for image/audio/video/document, which
are different from the system MIME type icons.

Check the attached bug for before/after comparison.

Bug: 398996996
Test: m DocumentsUIGoogle && manual inspection
Flag: com.android.documentsui.flags.use_material3
Change-Id: I347fc268ad77f56e8863bb5a7596e01c3d6e3b1e