[automerger skipped] Allow key downgrade during staged install of apex...

[automerger skipped] Allow key downgrade during staged install of apex packages am: 16618cd8 am: ad63b613 -s ours am: 849bd644 -s ours am: a625241c -s ours am: c7b72944 -s ours

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

Change-Id: I3586f9e00335f6d81e37963db93305ca9ecf25b9