Reland "Finalize status message strings to align with specs"

This reverts commit 771dcc9e.

Reason for revert: Fixed tests

Bug: 407674931
Test: atest -c 'DocumentsUIGoogleTests:com.android.documentsui.JobPanelUiTest'
Flag: com.android.documentsui.flags.visual_signals_ro
Change-Id: I18ff082735410ee5ced8f8ca642bb4879913a281