Implemented missed call/voicemail notifications in NUI.

This CL shows and updates the missed call/voicemail count in the bottom nav. It
also clears the call log notifications when the user either leaves the call log
fragment or closes the activity after 3 seconds of browsing the call log.

Bug: 72525595
Test: tba
PiperOrigin-RevId: 184071058
Change-Id: I540c9e3d815e022b5e311cb02a3995e241b8a984