Maybe Indian Hawthorne (Rhaphiolepis indica). I say maybe because it should have berries now - BTW, the Cedar Waxwings love the berries. Have you seen small pink or white flowers or berries? Also, it should be 6' x 6'. Your's looks more like 6' tall and 4' wide.
There is a shrub that grows all over the San Jaoquin and Sacramento valleys that gets huge and refuses to die, no matter what. It may be that but I can't remember the name.
Its not a Camellia.
We need
@HamiltonSquare. I hope I remember that right.