ANDROID: GKI: Update GKI symbol list and ABI XML

7 function symbols added to support relayfs for QCOM
  'void relay_close(struct rchan *)'
  'struct file_operations relay_file_operations'
  'void relay_flush(struct rchan *)'
  'struct rchan * relay_open(const char *, struct dentry *, size_t, size_t, const struct rchan_callbacks *, void *)'
  'void relay_reset(struct rchan *)'
  'void relay_subbufs_consumed(struct rchan *, unsigned int, size_t)'
  'size_t relay_switch_subbuf(struct rchan_buf *, size_t)'

Bug: 294928093
Bug: 295269293
Change-Id: I3268ddfa281ee285d2215fa5148db03701a72c25
Signed-off-by: Stone Zhang <quic_stonez@quicinc.com>
(cherry picked from commit 69779024)
Signed-off-by: Aleksei Vetrov <vvvvvv@google.com>