Fix RefBase Explicit destruction

For an object to be managed by std smart pointer, its base class should NOT be "RefBase".  It is not only unnecessary but also risking the object being owned by android smart pointer as well, which may destroy the object two times.

This issue may be detected by the destructor of class RefBase, with the log complaint "RefBase: Explicit destruction,..."

Test: monkey test for one day and one night

Signed-off-by: Jintao Zhu <zhujtcsieee@gmail.com>
Change-Id: If7736770983e17f5a4125b19dfbd1745ee5a9589

sensors/common/utils/EventMessageQueueWrapper.h

@@ -33,7 +33,7 @@ namespace sensors {
 namespace V2_1 {
 namespace implementation {
 
-class EventMessageQueueWrapperBase : public RefBase {
+class EventMessageQueueWrapperBase {
   public:
     virtual ~EventMessageQueueWrapperBase() {}