ANDROID: GKI: update xiaomi symbol list

ABI DIFFERENCES HAVE BEEN DETECTED!

2 function symbol(s) added
  'int mmc_set_blocklen(struct mmc_card *, unsigned int)'
  'unsigned long int nr_free_buffer_pages()'

Bug: 273389886
Bug: 273854148

Change-Id: Id8f851c375beb47a6e6b7fd19b61db39bcaff539
Signed-off-by: fengqi <fengqi@xiaomi.com>
(cherry picked from commit f3091267)