Add getSupportedExtensions to sample drivers

Bug: 118603011
Test: NeuralNetworksTest_static
Change-Id: I7342d722f7e808099aaf7148b639f89a6dbe5dd5
Merged-In: I7342d722f7e808099aaf7148b639f89a6dbe5dd5
(cherry picked from commit 87533a71886c4a57251e8eb0d905741c64bf2ca9)
2 files changed