Since original string is too long for DND conditional subtext, separate
DND conditional to two different states, one is for "Phone muted" state,
the othe is for "With exceptions" state.
Also, clean up the strings of other product variants for the conditional.
Bug: 122929205
Test: visual
Change-Id: Icb156ff9a4858a26355d92e6d4fb82ad1927b278