Discontinue maintenance and active support of ArmNN on Pixel phones. This reverts commit 4564ee58a431ea2407ee2ef160b98aa17c2449e3. Reason for revert: resubmitting again together with a fix for the broken test Bug: 294459623 Change-Id: I4635c49836dd0e5716308ed0184b14954ccdbd6b Test: Local nnapi_info Test: Presubmit