Fix deep copy of fade manager config when using copy cosntructor

SparseArray clone is not effective when deep copying. Add a
custom copier to iterate through the sparse array and manually
copy each entry.

Bug: 307354764
Test: m gts && atest -c com.google.android.gts.audio.AudioHostTest
Change-Id: Ia899be2b7a5c1ef2fe7d9f4cde5f36b5e65d3462