Add Float16 support to GATHER

Fix: 118609027
Test: NeuralNetworksTest_static
Change-Id: Ia4fcf25ed4e0b2940f92b6c60bdd4233b081cf86
Merged-In: Ia4fcf25ed4e0b2940f92b6c60bdd4233b081cf86
(cherry picked from commit cb8c4c99bd444ec7b96b75df4cc397e8dfcd60f5)
9 files changed