Add GpuNnapiTest to test GPU -> NNAPI synchronization.

This CL introduces a new test suite GpuNnapiTest that exercises a GPU ->
NNAPI pipeline using AHardwareBuffer and sync fence. The tests use
introspection API to run the pipeline with each individual driver,
expecting fenced executions to succeed if the model can be successfully
prepared.

Bug: 188079806
Test: NNT_static
Change-Id: I27d819772ddd6a258d1aad542278502be348220a
Merged-In: I27d819772ddd6a258d1aad542278502be348220a
(cherry picked from commit b212744cd8b984db34adc92ad77ee772d2f53ef3)
5 files changed