Rename ProtoLogGroup to WmProtoLogGroups

This is a first step refactor to create a ProtoLogGroup class that can
be used to create the protolog groups instead of using enums, which
should be immutable and are currently not being used as such.

Bug: 369370597
Test: m droid
Flag: EXEMPT renaming refactor
Change-Id: I58bef1b339f6f44c0ab460b7ba779140992b9774