. timsort was a 3rd party contribution. One of timsort's developers copied an internal Java function as an interim solution until he could link to that function directly. This function is a simple array bound check function a 1st year CS student could write call rangeCheck.
That 3rd party contributor was Google. When it came to implementing timsort for the Android, Google took their contribution and accidentally failed to replace rangeCheck
I read an article that commented on that particular part of the suit, though I can't find it now. The (possibly erroneous) conclusion drawn went:
Oracle are suing Google for reusing a trivial piece of code that they freely contributed to Java.
The reasoning behind Oracle's suit seems pretty Open .. and Shut:Oracle and Java: Mobile dev FAIL dooms Ellison's future