ART: Use __ANDROID__ instead of HAVE_ANDROID_OS

Use the proper define.

Change-Id: I71e291ac25f5d5f0187ac9b6ef2d6872f19e6085
diff --git a/compiler/dwarf/dwarf_test.cc b/compiler/dwarf/dwarf_test.cc
index 4d423d0..a07d27c 100644
--- a/compiler/dwarf/dwarf_test.cc
+++ b/compiler/dwarf/dwarf_test.cc
@@ -27,7 +27,7 @@
 namespace dwarf {
 
 // Run the tests only on host since we need objdump.
-#ifndef HAVE_ANDROID_OS
+#ifndef __ANDROID__
 
 constexpr CFIFormat kCFIFormat = DW_DEBUG_FRAME_FORMAT;
 
@@ -336,7 +336,7 @@
   CheckObjdumpOutput(is64bit, "-W");
 }
 
-#endif  // HAVE_ANDROID_OS
+#endif  // __ANDROID__
 
 }  // namespace dwarf
 }  // namespace art