Implement base job progress item

This implements a skeleton item with progress and message. Also adds the
recycler list used to display these items.

The items are still incomplete, missing proper expand/collapse, status
messages and other behaviour.

Bug: 385841321
Test: atest -c 'DocumentsUIGoogleTests:com.android.documentsui.JobPanelUiTest'
Flag: com.android.documentsui.flags.visual_signals_ro

Change-Id: Ieee1d0b8bd947387c8e13aaf3df8acee73ba1b88