Add column for call mapping id to AnnotatedCallLog database.

This will ensure call mapping used by RTT etc. won't break when migrating to
new way to generate the call mapping id since they are stored in the database
already.

Bug: 77717594
Test: unit tests
PiperOrigin-RevId: 195132562
Change-Id: Ieb52489b19b37ac2701967eb570a96457ceed4c0