Add float16 support for SPLIT

Fix: 118608988
Test: NeuralNetworkTest_static
Change-Id: I1f967347deae56682c6b79398e25f19a278d6707
Merged-In: I1f967347deae56682c6b79398e25f19a278d6707
(cherry picked from commit e0b17ab72f8128bd181f02a946cfcc9f47ac9bd0)
31 files changed