They have kept the movie in the MCU canon, but it's rarely ever discussed. Even your little blurb was what, 12 words total? The only other mention's have been maybe Banner's cabin in AoS or Ross showing up again in Civil War. As I said, watch any of the Marvel specials like the 75th anniversary special on ABC or the Marvel documentary just before Ultron came out, every other MCU project was talked about including AoS, the one-shots dvd extra's, etc. Barely a mention or footage shown of The Incredible Hulk, it's the red-headed stepchild of the MCU.
Every Marvel movie is on heavy rotation on the channel FX and has been for years, all the Iron Mans, Thors, Caps, Avengers, etc. They have marathons it seems like nearly one weekend out of every month. The Incredible Hulk is rarely, if ever, shown. Maybe its not a grand conspiracy, maybe they don't show it because it sucked?