Replace NotificationManager @hide APIs

Connectivity service module is using some NotificationManager
@hide APIs but they are not able to call after CS become a
mainline module. Thus, replace them with similar System APIs.

Bug: 170593746
Test: atest FrameworksNetTests
Change-Id: I2644867cfc01d8d651c7029134294a9d44fdb471
5 files changed
tree: 7df08cbc4505e5edeacaea7cb3b939e58c64101d
  1. core/
  2. services/
  3. tests/