Use the right keys in trigger_wait_ac_task.py

NoTry: true
Bug: skia:7469
Change-Id: I2a77574f35354f75e628968f943be54afa9e3bf9
Reviewed-on: https://skia-review.googlesource.com/105981
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
1 file changed