ART: Clean up field initialization

Add explicit field initialization to default value where necessary.
Also clean up interpreter intrinsics header.

Test: m
Change-Id: I7a850ac30dcccfb523a5569fb8400b9ac892c8e5
diff --git a/compiler/optimizing/licm_test.cc b/compiler/optimizing/licm_test.cc
index 5bcfa4c..8d15f78 100644
--- a/compiler/optimizing/licm_test.cc
+++ b/compiler/optimizing/licm_test.cc
@@ -28,7 +28,18 @@
  */
 class LICMTest : public CommonCompilerTest {
  public:
-  LICMTest() : pool_(), allocator_(&pool_) {
+  LICMTest()
+      : pool_(),
+        allocator_(&pool_),
+        entry_(nullptr),
+        loop_preheader_(nullptr),
+        loop_header_(nullptr),
+        loop_body_(nullptr),
+        return_(nullptr),
+        exit_(nullptr),
+        parameter_(nullptr),
+        int_constant_(nullptr),
+        float_constant_(nullptr) {
     graph_ = CreateGraph(&allocator_);
   }