logd: clarify release_Locked() for static analyzer

(cherry pick from commit 0ecdec7a09)

release_Locked() is called with a reference count and threadRunning,
the static analyzer can not tell this and estimates that a call to
delete this will occur. So let us invent a new call
release_nodelete_Locked() to ensure it is clear we will not be
arranging a delete this in the context of this code path. The
delete this will follow in the immediate codepath in this function
after threadRunning is cleared, and decRef_Locked() is called.

Change will also remove any developer FUD regarding release_Locked()
usage at this location.

SideEffects: None

Bug: 27434831
Change-Id: I91b060b2dadc72cc449fa381c934afb577bee037

logd/LogTimes.cpp

@@ -90,7 +90,7 @@ void LogTimeEntry::threadStop(void *obj) {
         while(it != times.end()) {
             if (*it == me) {
                 times.erase(it);
-                me->release_Locked();
+                me->release_nodelete_Locked();
                 break;
             }
             it++;

logd/LogTimes.h

@@ -75,7 +75,13 @@ public:
     void triggerSkip_Locked(log_id_t id, unsigned int skip) { skipAhead[id] = skip; }
     void cleanSkip_Locked(void);
 
-    // Called after LogTimeEntry removed from list, lock implicitly held
+    // These called after LogTimeEntry removed from list, lock implicitly held
+    void release_nodelete_Locked(void) {
+        mRelease = true;
+        pthread_cond_signal(&threadTriggeredCondition);
+        // assumes caller code path will call decRef_Locked()
+    }
+
     void release_Locked(void) {
         mRelease = true;
         pthread_cond_signal(&threadTriggeredCondition);