Revert "Revert "Method Handles: Add VarargsCollector.""

This reverts commit 12af7a41c224923fb55699305008214636a1a3da.

Test: m test-art-host-run-test-956-methodhandles
Bug: 30550796
Change-Id: Ia820093bab919667729daba5b14330de51a63f79
5 files changed