Add new op PRELU.

Add reference CPU implementation for PRELU with FP32/Quant8 input data
type.

Create tests for the new op. Testcases are from TFLite tests, and are
verified by execution on Caffe2 lib with the same op and args. Generate
cts/vts tests.

Bug: 113562575

Test: NeuralNetworksTest_static
Change-Id: Ia5008edf88fc241b25f92ab482847c1c3fc8ee46
Merged-In: Ia5008edf88fc241b25f92ab482847c1c3fc8ee46
(cherry picked from commit 464ffb90a307c78d4a6db3555b78176360fa666b)
9 files changed
tree: 8ff16486935ab2b72c6bb70e43ab870bb857c7c0
  1. nn/
  2. .clang-format
  3. CleanSpec.mk
  4. OWNERS
  5. PREUPLOAD.cfg