Support specifying array slice for D3D11 texture EGLImage Client can specify array slice for creating the SRV/RTV with EGL_D3D11_TEXTURE_ARRAY_SLICE_ANGLE. Test: D3DTextureTest.TextureArrayImage* Bug: angleproject:5538, chromium:1116101 Change-Id: I81cb2823df2145f1d05ad1526b0e36d6a0724d5e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2628609 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Sunny Sachanandani <sunnyps@chromium.org>