Remove mSubscriberIdMatchRule from NetworkTemplate

Currently, mSubscriberIdMatchRule is only used in NetworkTemplate
and it depends on if mMatchSubscriberIds is empty or not. Thus,
remove it since is not really necessary and replace it with
checking matchSubscriberIds if needed.

Bug: 238843364
Test: build, FrameworksNetTests
      CtsNetTestCases
Change-Id: Ic66d2ff2826846778b004bb15a4718a62fa1f470
3 files changed