CCodecWatchdog: never destruct once constructed

Bug: 356820254
Test: presubmit
Flag: EXEMPT bugfix
Change-Id: If0c70ef504ee97e51be12324452e3182b56085ae
diff --git a/media/codec2/sfplugin/CCodec.cpp b/media/codec2/sfplugin/CCodec.cpp
index 373f86e..68f1dda 100644
--- a/media/codec2/sfplugin/CCodec.cpp
+++ b/media/codec2/sfplugin/CCodec.cpp
@@ -96,11 +96,14 @@
 
 public:
     static sp<CCodecWatchdog> getInstance() {
-        static sp<CCodecWatchdog> instance(new CCodecWatchdog);
-        static std::once_flag flag;
-        // Call Init() only once.
-        std::call_once(flag, Init, instance);
-        return instance;
+        static sp<CCodecWatchdog> sInstance = [] {
+            sp<CCodecWatchdog> instance = new CCodecWatchdog;
+            // the instance should never get destructed
+            instance->incStrong((void *)CCodecWatchdog::getInstance);
+            instance->init();
+            return instance;
+        }();
+        return sInstance;
     }
 
     ~CCodecWatchdog() = default;
@@ -146,11 +149,11 @@
 private:
     CCodecWatchdog() : mLooper(new ALooper) {}
 
-    static void Init(const sp<CCodecWatchdog> &thiz) {
-        ALOGV("Init");
-        thiz->mLooper->setName("CCodecWatchdog");
-        thiz->mLooper->registerHandler(thiz);
-        thiz->mLooper->start();
+    void init() {
+        ALOGV("init");
+        mLooper->setName("CCodecWatchdog");
+        mLooper->registerHandler(this);
+        mLooper->start();
     }
 
     sp<ALooper> mLooper;