/usr/include/android/libdex/ is in android-libdex-dev 7.0.0+r33-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/android/libdex/CmdUtils.h
/usr/include/android/libdex/DexCatch.h
/usr/include/android/libdex/DexClass.h
/usr/include/android/libdex/DexDataMap.h
/usr/include/android/libdex/DexDebugInfo.h
/usr/include/android/libdex/DexFile.h
/usr/include/android/libdex/DexOpcodes.h
/usr/include/android/libdex/DexOptData.h
/usr/include/android/libdex/DexProto.h
/usr/include/android/libdex/DexUtf.h
/usr/include/android/libdex/InstrUtils.h
/usr/include/android/libdex/Leb128.h
/usr/include/android/libdex/OptInvocation.h
/usr/include/android/libdex/SysUtil.h
/usr/include/android/libdex/ZipArchive.h
/usr/include/android/libdex/sha1.h