interfaces/neuralnetworks: bring up to date with upstream

This CL brings the support code for NNAPI up to date with upstream, and
is compatible with the current implementation of aosp-frameworks-ml-nn.

BUG=b:187466859
TEST=FEATURES=test emerge-volteer aosp-frameworks-ml-nn

Change-Id: If6f2b26db82e03691cfff8f37f8507963d1316e2
tree: dc25ed68a7d37cb190a28c01c84f8bb2e874bb47
  1. 1.0/
  2. 1.1/
  3. 1.2/
  4. 1.3/
  5. aidl/
  6. utils/
  7. README
  8. TEST_MAPPING