Multisampled texture with unfilterable internalformat and default filter state shouldn't
be justified as incomplete texture in angle. However, the default filter state is set to
LINEAR and internalformat like R8I or R8UI is not filterable, which lead to texture
incomplete.

In es 3.1 spec 8.16, 'The effective internal format specified for the texture arrays is a
sized internal color format that is not texture - filterable(see table 8.13), and either
the magnification filter is not NEAREST or the minification filter is neither NEAREST nor
NEAREST_MIPMAP_NEAREST'.

As to Table 20.11, The default value of minFilter is NEAREST_MIPMAP_LINEAR, magFilter is LINEAR.

Because in 11.1.3.3,'Multisample textures are not filtered when samples are fetched, and filter
state is ignored.' So we ignore filtering for multismaple texture completeness.

BUG=angleproject:1590
TEST=dEQP-GLES31.functional.shaders.builtin_functions.texture_size.samples_*_texture_2d
TEST=dEQP-GLES31.functional.shaders.builtin_functions.texture_size.samples_*_texture_int_2d
TEST=dEQP-GLES31.functional.shaders.builtin_functions.texture_size.samples_*_texture_uint_2d
TEST=dEQP-GLES31.functional.texture.multisample.samples_*.use_texture_color_2d
TEST=dEQP-GLES31.functional.texture.multisample.samples_*.use_texture_int_2d
TEST=dEQP-GLES31.functional.texture.multisample.samples_*.use_texture_uint_2d
TEST=dEQP-GLES31.functional.texture.multisample.samples_*.use_texture_depth_2d

Change-Id: I0533bd028e0bbb66d9f731a2395f6c8ae7db8938
Reviewed-on: https://chromium-review.googlesource.com/564843
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>