Now that we only show dots instead of badges, we can simplify some logic
and remove a couple unused methods.
Change-Id: I72056eeb12e8968ec67b4c5b3a450d2ed5d4ee84
This will reduce confusion with the other "badging" concept we use for,
e.g. work profiles. It is also consistent with the external name
"notification dots".
Change-Id: I2a2c9d96dc0d6284eb0c48adc78a856271caad4d
Tony Wickham