Thanks for the replies. It seems that the information is out there, just not put together very well. I did find the Android Release Notes document (lm80-p0436-12_android_release_notes-revh) on that Qualcomm page. It is dated 11/2016 and references the Android M Release. Perhaps this is what I'm looking for, but I have no idea how that document might be related to the Android build downloaded from http://builds.96boards.org/snapshots/dragonboard410c/qualcomm/android/128/ . Dates on the build 128 page are 1/9/2017, so they don't match but it could be the right document. Hopefully, as vchong said, the Linaro folks will provide some better info in the near future.