Merge changes I828a75fd,Idcb80ad9,Id7dbc0e1,Ic55a0b22

* changes:
  Move private fields from cb_handle_t to cb_handle_30_t
  Reland: Move `stride` into `cb_handle_t` from `cb_handle_30_t`
  Remove the CAMERA_x usage checks from our gralloc
  Remove `PixelFormat::IMPLEMENTATION_DEFINED` from our gralloc