According to Google's introduction, starting with Android N, the Android API is supposed to support Java streams.
However, using the Android N preview SDK, I am unable to use any of the Stream APIs in my project (which is configured with Android N as minimum, target and build SDK version).
It's not yet in the current preview, but it has already been merged into the AOSP Git master. See here https://android.googlesource.com/platform/libcore/+/916b0af2ccdd1bdfc0283b1096b291c40997d05f
Just to avoid possible confusion: in March 2016, when this question has been asked by the OP, Android N developer
preview-1 was the only publicly available build of what is now known as Android 7.0 "Nougat".
preview-1 build did in fact not include the Java 8 Stream API, but it was added shortly after (one month later) in the developer
So, Android 7.0 API level 24 does support the Java 8 Stream API now.