Use sdk variant of Soong modules when LOCAL_SDK_VERSION is set

Soong now makes a variant of native modules that set sdk_version.
Use the new variant for native modules or apps with JNI that are
defined in Make and set LOCAL_SDK_VERSION.

Test: m checkbuild
Bug: 149591340
Change-Id: Ief378a007e43b0aea31fd5845410bbffec0ffae6