Added avatar support for Gear VR.
Gear VR avatar art assets are embedded within Gear VR Oculus Home.
Gear VR avatar meshes have 1/4 the tri-count of Rift avatar meshes.
Gear VR avatar materials are simplified using ASTC textures.
There is a default assumed head height of 170cm.
Unity Gear VR and Rift are combined in a single Unity package. There is a separate Avatar plugin app ID field for Gear VR to facilitate building separate Rift and Gear VR targets from the same project.
The Native Gear VR sample code is in the Sample/MirrorAndroid directory. Some assembly using the Mobile SDK's VrTemplate script is required.
Avatars now use less CPU. We reduced the required garbage collection from 140kb to 5kb per frame.
Reduce drawcalls per eye from 11 to 3 using the Unity Combined Meshes option.