Update the way we change meteredness of cellular networks in tests. am: 37c10a2252

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1582844

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Id7eb095710da17da8a6e7785051029d81a64ac7d
tree: 711b4196d9364203a8669818994ff0f99992a15e
  1. tests/
  2. Tethering/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg
  6. TEST_MAPPING