ANDROID: ABI: refresh, CRC fixups and allowed breaks

struct task_dma_buf_record and struct task_dma_buf_info will NEVER be
exposed to vendor modules, except possibly via an opaque pointer. Their
definitions can therefore be hidden from MODVERSIONS CRC machinery,
allowing arbitrary future changes.

The addition of dmabuf_info changed the size of task_struct, but there
is reserved space available.

This change

- hides task_dma_buf_record and task_dma_buf_info from genksyms
- moves the new dmabuf_info member of task_struct into reserved
  padding, preserving the existing structure size and symtype
  information
- refreshes the ABI
- adds the ABI change to task_struct as an allowed break

Bug: 424648392
Change-Id: I22c56979ce187486a2789fc1a0ec036afb4808d1
Signed-off-by: Giuliano Procida <gprocida@google.com>