am 200f2598: Build without OpenCore by default, remove obsolete opt-in to stagefright.

Merge commit '200f25984ccc8a9e5fc13bfbcde22c17bc80d410' into gingerbread-plus-aosp

* commit '200f25984ccc8a9e5fc13bfbcde22c17bc80d410':
  Build without OpenCore by default, remove obsolete opt-in to stagefright.