Implemented remove starred contact from speed dial fragment.

This is triggered by long pressing a SpeedDialUiItem and selecting remove in
the resulting menu. This will remove it's assocaited entry from the
SpeedDialEntry database and if the contact associated with the SpeedDialUiItem
being removed only has one speed dial entry, additionally we will unstar the
contact as well.

Bug: 77761023
Test: WIP
PiperOrigin-RevId: 194606709
Change-Id: I4d6fb104a388c39c77796f7626cd63e991303a51