ANDROID: GKI: add symbol list for pixel watch

2 function symbol(s) added
  'void add_taint(unsigned int, enum lockdep_ok)'
  'int mod_timer_pending(struct timer_list*, unsigned long)'

1 variable symbol(s) added
  'struct bus_type spi_bus_type'

Bug: 321098228
Bug: 324905919
Change-Id: I13c8e6da30dcb512706fcf6a951f30649449ba48
Signed-off-by: Ben Fennema <fennema@google.com>