Added new target to core_platform list of allowed modules

Re-added plugin of intdefs annotation processor. The plugin was
added to a different target (`framework-minus-apex-intdefs`)
because of the refactoring of the `framework-all` target.

Because the new target depends on `core_platform`, it needs to
also be added to this list.

Test: run 'mp :framework-minus-apex-intdefs' and check that it builds
Change-Id: I96d4941219560049c9a014a40de39978c9e5bbb8

java/legacy_core_platform_api_usage.go

@@ -90,6 +90,7 @@ var legacyCorePlatformApiModules = []string{
 	"framework-all",
 	"framework-jobscheduler",
 	"framework-minus-apex",
+	"framework-minus-apex-intdefs",
 	"FrameworkOverlayG6QU3",
 	"FrameworksCoreTests",
 	"FrameworksIkeTests",