Fix broken test

The assertion here is just wrong. In setup we install a new ART APEX
and reboot, which will recompile both Zygote and System Server
artifacts.

Then the test marks a different APEX as updated and triggers
recompilation, which should only affect System Server artifacts,
precisely because --compilation-os-mode no longer does a
force-compile.

This new version is exactly what Jiakai said I should do
(https://r.android.com/c/platform/art/+/1964960/1..4//COMMIT_MSG#b21,
https://r.android.com/1964844), but somehow I managed to convince
myself to do the wrong thing instead.

Bug: 217446385
Bug: 211458160
Test: atest OdrefreshHostTest#verifyCompilationOsMode
Change-Id: I10cac92c6abf4eead1f25a85a15de271dccfd78c
1 file changed