Change NNAPI Memory to ref-counted SharedMemory -- hal

Bug: 179906132
Test: mma
Test: NeuralNetworksTest_static
Test: presubmit
Change-Id: I6435db906a2efe4938da18149a1fcd6d24730a95
Merged-In: I6435db906a2efe4938da18149a1fcd6d24730a95
(cherry picked from commit 79a16ebb6f42c21a21202f7b63ce372f2df15137)
26 files changed