Enforce the legacy core/platform API restriction.

This change silently decides whether modules which depend on either
sdkPrivate or sdkCorePlatform get the legacy or the stable version of
the core/platform API, based on whether the module's name is on a
hard-coded list or not.

Test: m java
Test: make a target from the list when its entry is commented out, which correctly fails
Bug: 157640067
Change-Id: I15e5a6c2f07e73718803501d705de0d7ab9bec90