Revert "Support using opaque JNI ids"

This reverts commit 21d5994583c679cd5d8573b5d35dbd659bdca2c7.

Bug: 134162467

Reason for revert: Breaks debuggable

Change-Id: I9510a6ac208d392ff25ee196a1a519fecd151445
diff --git a/runtime/thread.h b/runtime/thread.h
index 9a230e2..8fe9466 100644
--- a/runtime/thread.h
+++ b/runtime/thread.h
@@ -1901,13 +1901,12 @@
 class ScopedExceptionStorage {
  public:
   explicit ScopedExceptionStorage(Thread* self) REQUIRES_SHARED(Locks::mutator_lock_);
-  void SuppressOldException(const char* message = "") REQUIRES_SHARED(Locks::mutator_lock_);
   ~ScopedExceptionStorage() REQUIRES_SHARED(Locks::mutator_lock_);
 
  private:
   Thread* self_;
   StackHandleScope<1> hs_;
-  MutableHandle<mirror::Throwable> excp_;
+  Handle<mirror::Throwable> excp_;
 };
 
 std::ostream& operator<<(std::ostream& os, const Thread& thread);