Revert "ART: Disable part of ImageSpace loading test"

This reverts commit 4b3fdfe0919e8de954924ec6b785743eb4895e80.

The bug 63622587 was fixed by
    https://android-review.googlesource.com/524979 .

Test: m test-art-host-gtest-image_space_test
Bug: 63622587
Change-Id: I7d2e8b6902d01b0ac7b7813d48a550341583601b
diff --git a/runtime/gc/space/image_space_test.cc b/runtime/gc/space/image_space_test.cc
index 429abf3..fcc47d4 100644
--- a/runtime/gc/space/image_space_test.cc
+++ b/runtime/gc/space/image_space_test.cc
@@ -139,11 +139,10 @@
   EXPECT_FALSE(Runtime::Current()->GetHeap()->GetBootImageSpaces().empty());
 }
 
-// Disabled for b/63622587.
-// using ImageSpaceNoDex2oatNoPatchoatTest = ImageSpaceLoadingTest<true, true, false, false>;
-// TEST_F(ImageSpaceNoDex2oatNoPatchoatTest, Test) {
-//   EXPECT_TRUE(Runtime::Current()->GetHeap()->GetBootImageSpaces().empty());
-// }
+using ImageSpaceNoDex2oatNoPatchoatTest = ImageSpaceLoadingTest<true, true, false, false>;
+TEST_F(ImageSpaceNoDex2oatNoPatchoatTest, Test) {
+  EXPECT_TRUE(Runtime::Current()->GetHeap()->GetBootImageSpaces().empty());
+}
 
 using ImageSpaceNoRelocateNoDex2oatNoPatchoatTest = ImageSpaceLoadingTest<true, false, false, false>;
 TEST_F(ImageSpaceNoRelocateNoDex2oatNoPatchoatTest, Test) {