IPCThreadState: Workaround to improve robustness

- From Xiaomi Android 13 Sources

Change-Id: I818ff20b8eee8a172cfedfd39d67a9533e25b590
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>

Author: johnmart19

libs/binder/IPCThreadState.cpp

@@ -740,7 +740,8 @@ void IPCThreadState::processPendingDerefs()
             while (mPendingWeakDerefs.size() > 0) {
                 RefBase::weakref_type* refs = mPendingWeakDerefs[0];
                 mPendingWeakDerefs.removeAt(0);
-                refs->decWeak(mProcess.get());
+                if (refs)
+                    refs->decWeak(mProcess.get());
             }
 
             if (mPendingStrongDerefs.size() > 0) {
@@ -750,7 +751,8 @@ void IPCThreadState::processPendingDerefs()
                 // the decWeak() first.
                 BBinder* obj = mPendingStrongDerefs[0];
                 mPendingStrongDerefs.removeAt(0);
-                obj->decStrong(mProcess.get());
+                if (obj)
+                    obj->decStrong(mProcess.get());
             }
         }
     }