Add gen_ndk_usedby_apex.sh script to generate NDK API list used by Mainlain modules when modules get build. Test: TARGET_BUILD_APPS=com.android.adbd m dist apps_only Change-Id: I39e5aa7c74eff46aba06808642b2bd67ae45ba1e Merged-In: I39e5aa7c74eff46aba06808642b2bd67ae45ba1e