[DU02]Remove DevicePolicyManagerInternal from NetworkStatsAccess

NetworkStatsAccess is using DevicePolicyManagerInternal APIs, which
cannot be accessed after moving into the mainline module. So, replace
and remove those hidden API usages.

Bug: 207100745
Test: atest NetworkStatsAccessTest
Change-Id: I0802148050869d92e1f09d1d657034380029f236
1 file changed
tree: 86514bfde3df5e5808a44e056d8f19221c8c5a42
  1. core/
  2. framework/
  3. framework-t/
  4. service-t/
  5. services/
  6. tests/