Walt Disney Co. let the world know Thursday that it understands fans — and even shareholders — want it to dramatically step up its streaming game and add more grown-up programs to its kid-safe library. The company already has drawn almost 87 million subscribers to its namesake app, but Disney+ and other new streaming-video services still face the test of whether their offerings are complete enough for Netflix devotees to make the switch. For the first time, the answer for many may soon be “yes.” And Star, an as yet little-known Indian TV brand, is set to play a pivotal