Revert "Disable x86 FromCpuFeatures test"

This reverts commit 0713ca0525579365ae927ac800797a7473d9267f.

Reason for revert: bug with simd extension not being detected on some CPUs is fixed in cpu_features (see https://android-review.googlesource.com/c/platform/external/cpu_features/+/1460885)

Bug: 169921883
Change-Id: Ibce2c5ca923ec34f8b2350bae85fbe383952be25
diff --git a/runtime/arch/instruction_set_features_test.cc b/runtime/arch/instruction_set_features_test.cc
index e926147..82b8242 100644
--- a/runtime/arch/instruction_set_features_test.cc
+++ b/runtime/arch/instruction_set_features_test.cc
@@ -177,14 +177,6 @@
 }
 
 TEST(InstructionSetFeaturesTest, FeaturestFromCpuFeatures) {
-  // Test globally disabled on x86 because of cpu_features not detecting SSSE3,
-  // SSE4.1 and SSE4.2 extensions on fugu's CPU
-  // (see https://github.com/google/cpu_features/issues/4)
-  // TODO(b/169921883): Re-enable when cpu_features detects these CPU features
-  // when running on fugu.
-
-  TEST_DISABLED_FOR_X86();
-
   // Take the default set of instruction features from the build.
   std::unique_ptr<const InstructionSetFeatures> instruction_set_features(
       InstructionSetFeatures::FromCppDefines());