Add EMBEDDING_LOOKUP_SPARSE op

Fix: 113561887
Test: NeuralNetworksTest_static
Change-Id: I3926bc2f567db41b9693db8cfb784e66c05718b0
Merged-In: I3926bc2f567db41b9693db8cfb784e66c05718b0
(cherry picked from commit 6a891cb900015fde9aa8b7a20139c3b7bc73f0df)
10 files changed