Merge changes from topic "nnapi-execution-preference" into pi-dev

* changes:
  NNAPI: Add execution preference to prepareModel (runtime)
  Upgrade NeuralNetworks v1.0 to v1.1 followup CL
tree: bc2e9334f219402a629bb1b68dd4b50540339c6d
  1. common/
  2. driver/
  3. runtime/
  4. tools/
  5. Android.bp
  6. CleanSpec.mk
  7. OWNERS
  8. README.txt