Add /dev/vsock permissions to microdroid

microdroid_manager needs to know its own CID until the full RPC binder
support is landed.

Bug: 191845268
Test: run MicrodroidDemoApp
Test: atest MicrodroidHostTestCases
Change-Id: I8f6c667f0827d1089baa21417c2b0ba382d94d26
1 file changed