Allow java_library.exclude_static_libs property for libcore and f/b/api

exclude_static_lib property was introduced to enable static lib
switching based on build configuration. The usage of property was
limited to build/soong directory to prevent other modules from using the
proerty.

In order to allow "core-lambda-stubs" and
"android-non-updatable.stubs.*" to utilize similar static lib switching
based on build configuration, allow exclude_static_libs property to be
used in libcore and frameworks/base/api directory.

Test: m nothing
Bug: 287344503
Change-Id: I342b09c7ada03607b12dc8896ae39825d8545e92