The two-hour season finale of NBC’s America’s Got Talent: The Champions (1.7 rating in the adults 18-49 demo, 10.53M viewers) was the most watched show on Presidents Day Monday in primetime, even in the demo but setting a season high as it wrapped its debut run. The NBC competition series split the nightly spoils with ABC’s two-hour The Bachelor (1.9, 6.48M), which also hit a season high and topped AGT in the key adults 18-49 demo for a sixth consecutive week as the two…