ART: Make trampoline compiler pointer-size-safe

The trampoline compiler uses offsets of runtime structures which
may change with the pointer size.

Add offset tests to jni_internal_test.

Bug: 26071368

(cherry picked from commit da9b763abc712fd6d1e24170a194abfbe795b8cd)

Change-Id: I01d1a3727f46b3015ac677afb5427337c3093402
diff --git a/runtime/indirect_reference_table.h b/runtime/indirect_reference_table.h
index d13526b..2d0ae63 100644
--- a/runtime/indirect_reference_table.h
+++ b/runtime/indirect_reference_table.h
@@ -344,8 +344,11 @@
     segment_state_.all = new_state;
   }
 
-  static Offset SegmentStateOffset() {
-    return Offset(OFFSETOF_MEMBER(IndirectReferenceTable, segment_state_));
+  static Offset SegmentStateOffset(size_t pointer_size ATTRIBUTE_UNUSED) {
+    // Note: Currently segment_state_ is at offset 0. We're testing the expected value in
+    //       jni_internal_test to make sure it stays correct. It is not OFFSETOF_MEMBER, as that
+    //       is not pointer-size-safe.
+    return Offset(0);
   }
 
   // Release pages past the end of the table that may have previously held references.