Update the peek icon from zoom to material visibility icon

Example is available at comment 2 on linked bug. This continues to use
the ic_zoom_out drawable as it's currently used in the public.xml file.

Fix: 390292960
Test: m DocumentsUIGoogle and observe GET_CONTENT
Flag: com.android.documentsui.flags.use_material3
Change-Id: Ibe8290c6240b38d273d11fc0fb52dd4e9dab912b