Check resource type, not directory for colors

Previously, Resources#getDrawable() would fail when trying to load a
ColorStateListDrawable from a ColorStateList defined in a resources
directory with a qualifier.

Bug: 137141830
Test: atest android.content.res.cts.ResourcesTest
Change-Id: I2ad57dd7cfa30de64653805d4ea209388ff90f41
1 file changed