ANDROID: GKI: Update symbol list for Zebra

3 function symbol(s) added
  'void drm_client_dev_hotplug(struct drm_device*)'
  'int drm_edid_to_sad(struct edid*, struct cea_sad**)'
  'int drm_edid_to_speaker_allocation(struct edid*, u8**)'

Bug: 427631467
Change-Id: I0e0dbe03e7d3deaa5bf0b7f42d4cdc3b48577973
Signed-off-by: Akshay M Joshi <aakshayjoshi892@gmail.com>