Sort constant declaration in Jill emitted code

This is avoiding an indetermism when there are several constants in one
block.

Bug: 63613532
Test: test-jack, comparison of multiple dex compilation from
firebase-iid-10.2-SNAPSHOT.aar

Change-Id: I88df97b1d8fbdf28de2b55568223fb3e00b64efc
1 file changed