Make NNAPI SL test more consistent with NNAPI in GMSCore behaviour
by keeping the NNAPI SL binaries as part of the APK instead of
decompressing them to disk.

Added an option to allow binaries to be extracted to test differences
in behaviour when loading from APK or disk.

Test: build_and_run_benchmark.sh -s
Change-Id: I8d6cafe39906d6b8b1353825e41280069e7e8df8