Use the instructions and patches here to enable the constants flag: #36479

DDC's Kernel-backend compiled SDK will not load. I've found a few issues so far:

• the SDK's internal annotations are not found. For example @nullCheck, @notNull, @JSExportName, @NoReifyGenerics, and probably other critical ones such as @JsPeerIterface.
• static calls seem to be tagging the target with RTTI, as if it were a tearoff. As a result, we attempt to create a dart.FunctionType before it has been defined. This might partly be an issue with @ReifyFunctionTypes, but even so, we should not be reifying in these cases as it is unnecessary. We'll need to double check that this works properly for user code.

Also a few minor/trivial issues (not P1) such as:

• integer constants are generated as if they were doubles: 1.0 instead of 1. This is valid, but has a very slight code size/readability cost.