Fix STOPSHIP in SyncManager

- Remove WTF about removing periodic syncs. We haven't seen any reports of this.
Having a detailed log should be enough.

- Check the number of endpoints in the "unexpected periodic sync removal" check.

Bug: 64809410
Test: manual test
Change-Id: Icd6e595281c1a302f6ceec661561d3911785562b
2 files changed