Proper API hierarchy between MODULE_LIBS and PRIV_APPS system APIs

Exempt-From-Owner-Approval: Cherry-picking from master

Test: build / treehugger
Bug: 146727827
Change-Id: Ie1ad6711c490c679ebcfacd97154380a8810ba1c
Merged-in: Ie1ad6711c490c679ebcfacd97154380a8810ba1c
3 files changed
tree: 8ed6b1cbf14fe8c90b23930c298424933d380f36
  1. Tethering/