ANDROID: GKI: Update symbol list for Exynos SoC

Updated ABI symbol list for Exynos SoC to android13-5.15 ACK.
There's only ABI adding.

Leaf changes summary: 2 artifacts changed
Changed leaf types summary: 0 leaf type changed
Removed/Changed/Added functions summary: 0 Removed, 0 Changed, 2 Added functions
Removed/Changed/Added variables summary: 0 Removed, 0 Changed, 0 Added variable

2 Added functions:

  [A] 'function int drm_gem_fb_begin_cpu_access(drm_framebuffer*, dma_data_direction)'
  [A] 'function void drm_writeback_cleanup_job(drm_writeback_job*)'

Bug: 239492404
Signed-off-by: Youngmin Nam <youngmin.nam@samsung.com>
Change-Id: Iac4077f31f35c6ffdd53f6002da3a8c0ac9aa343