[automerger skipped] Merge "Allow key downgrade during staged install of apex packages" am: 3a290c6b -s ours am: 388136b4 -s ours am: 18d24d5e -s ours am: 32ed0212 -s ours am: e675cb2b -s ours

am skip reason: Change-Id I0c0e6eaee65a6c77f62425c3929ffa805d1e0f47 with SHA-1 8e35db19 is in history

Change-Id: Ic62a3da1f6b9092674d180215a413378609f37a0