The Android Open Source Project refers to the components released by Google as open source. This is the framework for the most part, plus a few Java apps. The drivers are part of the per-device "BSP" layer, and not part of AOSP. They're sometimes delivered as source (certainly the kernel components are), but often not (the userspace HAL libraries are almost never source-visible).
This bug looks to be between the kernel driver and sensor HAL to me. It might be fixable in code we can see, but none of that is part of "AOSP".
