[SM04] Support fetching data with NetworkTemplate with subType

Add a NetworkTemplate build function that allows user to specify
subType. NetworkStats corresponding to the same group would
be retrieved.

Test: atest FrameworksNetTests
Bug: 129082217

Change-Id: Ie2d229be0b6bd239f799989c070475c73a096d71
Merged-In: Ie2d229be0b6bd239f799989c070475c73a096d71
(cherry picked from commit e19045cc)