Move BaseNetdUnsolicitedEventListener to frameworks/libs/net am: ee661dfb59 am: 8c250ac624 am: 5970ac8892

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1517960

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I4883d85dcef3dcb9c56abdd4ab75f99cad2778f8
tree: 679a1973d4e2154d787b860017e6663ce4a95a0c
  1. framework/
  2. tests/
  3. Tethering/
  4. .gitignore
  5. OWNERS
  6. PREUPLOAD.cfg
  7. TEST_MAPPING