SDK / exoplayer

FrameProcessor already support using different transfer function for input and
output color. This CL has two major changes:

- Create an eglSurface that recognizes BT.2020 PQ
  - This requires a separate extension that works only after 33
  - So we current throw, if input is HDR, and this extension doesn't work
- Create FrameProcessor with PQ output transfer function

PiperOrigin-RevId: 496023758