New issues raised upon testing on the Android API 24 emulator:
issue #28683: bind() on a unix socket raises PermissionError on Android for a non-root user
issue #28684: [asyncio] bind() on a unix socket raises PermissionError on Android for a non-root user
issue #28746: cannot set_inheritable() for a file descriptor on Android
issue #28759: access to mkfifo, mknod and hard links is controled by SELinux MAC on Android
issue #28762: configure links with lockf and F_LOCK is not declared in Android API 24
issue #28764: test_mailbox fails when run as a non-root user on Android API 24