Include evacuated bytes in heap size trace

Since ConcurrentCopying collector creates copies of objects that are in
the evac from-space, we need to report this during GC cycle using
TraceHeapSize().

Test: Flash device, run and analyse perfetto trace.
Bug: 139020078
Change-Id: Iff0da1de4c77da199c1c3b44ea488883e7fa4261
5 files changed