Reset num saved networks with mac randomization before counting

Even though this is already being reset after metrics upload, data
suggests that this is still getting double counted in some cases.

Clear the counter before looping through networks to make sure the state
is clean.

Bug: 145163801
Test: unit tests

Change-Id: Iaa1f5625458068f007313e58bb5a443a63810be8
1 file changed
tree: 6da8b6c6244fa01fae8a03c1b5848a5d58cd18fb
  1. service/
  2. PREUPLOAD.cfg