[SP18.1] add dependency object to OffloadController

In order to mock constant in unit test, a dependency object is
introduced with minimum code change to achieve this.

Test: atest TetheringTests
Bug: 149467454
Change-Id: I38628daddcb7be7c74846e78d36dc88f065b97d9
3 files changed
tree: 25ef1777e06df4bc8c827af395823613ef5f6e9d
  1. Tethering/