FBE devices now fully support adoptable storage.

FBE devices now fully support adoptable storage.

We've finished all the underlying work to support adoptable storage
on FBE devices, so remove the code that was disabling it by default.

To aid debugging, support blocking move commands (so that we log
the stdout) via a system property, so we don't have to recompile
end user devices stuck in funky states.

Test: cts-tradefed run commandAndExit cts-dev -m CtsAppSecurityHostTestCases -t android.appsecurity.cts.AdoptableHostTest
Bug: 29923055, 25861755, 33252673, 37289651
Change-Id: I6b781de7e196a1a50ba543843aca0caf74c3e282