DDC does not handle dynamic calls on null correctly

[askeksa-google]

After the fix for #32173 where all calls on dynamic are treated as unknown even if the method exists on Object, some DDC tests fail with runtime errors when calling Object methods on null.

[askeksa-google]

See this patchset for the exact failures: https://dart-review.googlesource.com/c/sdk/+/41762/7..8

[kmillikin]

In issue #32414 the language team decided that calls to methods on Object should be treated as statically typed even when the receiver has static type dynamic, provided that the argument counts match so that there is no possibility of hitting noSuchMethod.

We need to ensure that all the issues tagged with this issue number in the DDK status files are fixed.

[eernstg]

Right, here's the outcome from that discussion: dynamic-members.md.