Simple code clarity changes

Test: N/A
Bug: N/A
Change-Id: I2c11ef703856c158b48329dbef6485196cfc1d43
diff --git a/services/camera/virtualcamera/VirtualCameraSessionContext.cc b/services/camera/virtualcamera/VirtualCameraSessionContext.cc
index 284ad05..aab2d0d 100644
--- a/services/camera/virtualcamera/VirtualCameraSessionContext.cc
+++ b/services/camera/virtualcamera/VirtualCameraSessionContext.cc
@@ -129,7 +129,8 @@
           streamId);
     return std::optional<Stream>();
   }
-  return {it->second->getStreamConfig()};
+  VirtualCameraStream& stream = *it->second;
+  return {stream.getStreamConfig()};
 }
 
 std::shared_ptr<AHardwareBuffer> VirtualCameraSessionContext::fetchHardwareBuffer(
@@ -141,7 +142,8 @@
           streamId);
     return nullptr;
   }
-  return it->second->getHardwareBuffer(bufferId);
+  VirtualCameraStream& stream = *it->second;
+  return stream.getHardwareBuffer(bufferId);
 }
 
 std::shared_ptr<EglFrameBuffer>
@@ -154,7 +156,8 @@
           streamId);
     return nullptr;
   }
-  return it->second->getEglFrameBuffer(eglDisplay, bufferId);
+  VirtualCameraStream& stream = *it->second;
+  return stream.getEglFrameBuffer(eglDisplay, bufferId);
 }
 
 std::set<int> VirtualCameraSessionContext::getStreamIds() const {