Handle JavaBBinderHolder not init w/ mockito

Some mockito users mocking binders like:

    doReturn(...).when(...).asBinder()

Aren't seeing this field initialized when they are making transactions
on this binder object. This causes obtain(IBinder) to fail.

Bug: 252888512
Test: ServiceStateTrackerTest
Change-Id: Ib65948b86cf91f053e26af35629aa3f7d6062c51

core/jni/android_os_Parcel.cpp

@@ -101,9 +101,18 @@ static void android_os_Parcel_markSensitive(jlong nativePtr)
 static void android_os_Parcel_markForBinder(JNIEnv* env, jclass clazz, jlong nativePtr,
                                             jobject binder)
 {
+    LOG_ALWAYS_FATAL_IF(binder == nullptr, "Null binder specified for markForBinder");
+
     Parcel* parcel = reinterpret_cast<Parcel*>(nativePtr);
     if (parcel) {
-        parcel->markForBinder(ibinderForJavaObject(env, binder));
+        sp<IBinder> nBinder = ibinderForJavaObject(env, binder);
+
+        if (nBinder == nullptr) {
+            ALOGE("Native binder in markForBinder is null for non-null jobject");
+            return;
+        }
+
+        parcel->markForBinder(nBinder);
     }
 }
 

core/jni/android_util_Binder.cpp

@@ -798,6 +798,12 @@ sp<IBinder> ibinderForJavaObject(JNIEnv* env, jobject obj)
     if (env->IsInstanceOf(obj, gBinderOffsets.mClass)) {
         JavaBBinderHolder* jbh = (JavaBBinderHolder*)
             env->GetLongField(obj, gBinderOffsets.mObject);
+
+        if (jbh == nullptr) {
+            ALOGE("JavaBBinderHolder null on binder");
+            return nullptr;
+        }
+
         return jbh->get(env, obj);
     }