Currently, adding a history to a NetworkStatsCollection.Builder
will overwrite any history that was previously passed in with the
same key. This breaks the importer (which is the primary/only
caller of this code), because the importer re-uses the same
NetworkStatsCollection object to import multiple files.
Instead, simply add any passed-in entries after the ones that
were already there. Require the caller to pass in entries in
order, because NetworkStatsHistory internally assumes that
entris are always sorted.
Bug: 230289468
Test: manually verified this unbreaks the importer
Change-Id: Ic8647ff28fca78d579d5f759f96a864877f8158b
Merged-In: Ic8647ff28fca78d579d5f759f96a864877f8158b
(pure cherry-picked from ag/18453213)
ec2fbb7159