The $1.1 billion that a Texas oil heir was ordered to pay for leaving his 2-year-old stepson disabled in vicious beatings is the largest of its kind in US history — but it will still take years to collect even a fraction of the full amount, the boy’s attorney said Monday. Charles Brooks Jr. — the great-grandson of Humble Oil founding investor Percy Turner — was ordered to pay the eye-popping verdict last week to his 2-year-old former stepson, Blake Sampson, whom he left permanently bedridden,