nits removing extra space, change method name, etc

Minor cleanup as per nit comments on approved CLs in the relation chain.

Namely:
- removing an extranous space
- changing requestsSortedById() to be package private
- changing releaseNetworkRequest() name to releaseNetworkRequests()
- adding final in a couple spots
- added some test requests in testDumpDoesNotCrash()

Bug: 173145245
Bug: 173292541
Bug: 173146509
Bug: 171991028
Test: atest FrameworksNetTests
Change-Id: I177ec6072a44acd247022b65b56e90cc231094b9