gles: Initialize textures with a 0-buffer with glTexStorageXX.
gles: Initialize textures with a 0-buffer with glTexStorageXX.

For 2D texture arrays initialized with glTexStorage3D, you can easily end up rendering to just one layer. Before this CL, this would result in some layers getting data and others not getting a buffer for the Data field, resulting in UI issues when attempting to display the whole 2D array texture.
pmuetschard/gapid,google/gapid,google/gapid,pmuetschard/gapid,pmuetschard/gapid,baldwinn860/gapid,pmuetschard/gapid,pmuetschard/gapid,google/agi,baldwinn860/gapid,pmuetschard/gapid,baldwinn860/gapid,google/agi,google/gapid,google/gapid,google/gapid,pmuetschard/gapid,baldwinn860/gapid,google/agi,google/gapid,Qining/gapid,google/agi,pmuetschard/gapid,google/agi,google/agi,baldwinn860/gapid,Qining/gapid,Qining/gapid,google/gapid,Qining/gapid,baldwinn860/gapid,google/gapid,Qining/gapid,Qining/gapid,google/agi,google/agi,baldwinn860/gapid,baldwinn860/gapid,Qining/gapid,Qining/gapid