[SM10] Adopt helper class to monitor RAT type change per sub

Test: atest NetworkStatsServiceTest
Bug: 146415925
Change-Id: I45c3aa9046b316c8cd0943543d620a22e4afefd1
Merged-In: I45c3aa9046b316c8cd0943543d620a22e4afefd1
(cherry picked from commit 9f2e38da193cc30d2c39218c9d390cf29e40108e)
1 file changed
tree: 9f7bee8e450140c41b8df15caf8f9ffbe96b47b4
  1. core/
  2. services/
  3. tests/