Don't leak map fds in BpfCoordinator#dump. am: 555472a186 am: a6c9626b5d am: a47891732f

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1581523

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I7f92f0c2768775ab51018ec76feef9cab6e273c4
tree: c4ea711a5ae9ef6999dbb008c896f71aba89291b
  1. tests/
  2. Tethering/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg
  6. TEST_MAPPING