Show a "read-only" label when browsing an archive

Ensure that this label is only visible when the current folder is in a
browsed archive.

Bug: 406636160
Bug: 436724039
Bug: 436724293
Flag: com.android.documentsui.flags.zip_ng_ro
Flag: com.android.documentsui.flags.use_material3
Test: Manual

Change-Id: Ic8369f9caa491f2edc395035b25b5bde8a0d1f12