Fix/suppress incident* google-explicit-constructor warnings

* Add explicit to conversion constructors/operators
* Remove redundant explicit of copy constructors

Bug: 28341362
Test: make with WITH_TIDY=1 DEFAULT_GLOBAL_TIDY_CHECKS=-*,google-explicit-constructor
Change-Id: I26a11bb798d25605577269ed340e97afc8566960
diff --git a/cmds/incidentd/src/IncidentService.h b/cmds/incidentd/src/IncidentService.h
index e176bfd..140484b 100644
--- a/cmds/incidentd/src/IncidentService.h
+++ b/cmds/incidentd/src/IncidentService.h
@@ -97,7 +97,7 @@
 // ================================================================================
 class IncidentService : public BnIncidentManager {
 public:
-    IncidentService(const sp<Looper>& handlerLooper);
+    explicit IncidentService(const sp<Looper>& handlerLooper);
     virtual ~IncidentService();
 
     virtual Status reportIncident(const IncidentReportArgs& args);