[SM08] Add NetworkTemplate unit test for fetching mobile data usage

Test: atest NetworkTemplateTest
Bug: 129082217

Change-Id: I7eaca623adf93f9b8d53c2e5857ecae90ea572ab
Merged-In: I7eaca623adf93f9b8d53c2e5857ecae90ea572ab
(cherry picked from commit 4670baace6c8dafe3a30330596c333d6b2389e4d)
1 file changed