Add new op PAD_V2

Complete QUANT8 support requires adding a new UINT8 OperandType.
I intend to do that in a separate CL.

Bug: 113561890
Test: NeuralNetworksTest_static
Change-Id: Ie4be5521f2722c00c6655cd58005ab6681a82363
Merged-In: Ie4be5521f2722c00c6655cd58005ab6681a82363
(cherry picked from commit 638427a968fbdb9cd6cd0637eea502625eb5c8a0)
21 files changed
tree: 0e60273c2b938313cfbef49039f4f3634711e939
  1. nn/
  2. .clang-format
  3. CleanSpec.mk
  4. OWNERS
  5. PREUPLOAD.cfg