Add new ops ARGMAX and ARGMIN

Bug: 113558658
Test: NeuralNetworksTest_static
Change-Id: I8862d4062181689ce69ab65aa07c1b6af07ba567
Merged-In: I8862d4062181689ce69ab65aa07c1b6af07ba567
(cherry picked from commit cc31bd6622f5e01ab640916fbb26433dd4ff9db2)
1 file changed