Fix fdsan check

BUG: 140376618
Test: Downloaded a picture on Chrome (this would crash previously)
Change-Id: I7a750cde1131d19d140140dfaa0bd09131974fc0

model/VolumeBase.cpp

@@ -149,7 +149,7 @@ status_t VolumeBase::setFuseFd(android::base::unique_fd fuseFd) {
         return -EBUSY;
     }
 
-    mFuseFd.reset(std::move(fuseFd.get()));
+    mFuseFd = std::move(fuseFd);
     return OK;
 }
 

model/VolumeBase.h

@@ -122,6 +122,7 @@ class VolumeBase {
     status_t setId(const std::string& id);
     status_t setPath(const std::string& path);
     status_t setInternalPath(const std::string& internalPath);
+    // Takes ownership of the fd passed in.
     status_t setFuseFd(android::base::unique_fd fuseFd);
 
     android::sp<android::os::IVoldListener> getListener() const;