touch/novatek: change stylus battery type

Due to platform test restriction, change the battery type of a stylus
from _BATTERY to _UNKNOWN.

Bug: 294993466

Change-Id: I3be55ceafe25b1e9d6f4233550bfdd93229f4c9a
Signed-off-by: Hyungwoo Yang <hyungwooyang@google.com>
1 file changed
tree: bf293d8009fc345bfe0c84d412f257f34942d804
  1. nt36xxx/