Remove unnecessary allocation+unboxing of objects.

Transforming String->int can be done with 0 allocations
using Integer.parseInt.

bug: 28078871
Change-Id: I8d9f322d7154728849dde61ef282046032858d60
diff --git a/core/java/android/hardware/camera2/CameraManager.java b/core/java/android/hardware/camera2/CameraManager.java
index ffd9d89..3917bfa 100644
--- a/core/java/android/hardware/camera2/CameraManager.java
+++ b/core/java/android/hardware/camera2/CameraManager.java
@@ -223,7 +223,7 @@
                         " currently connected camera device", cameraId));
             }
 
-            int id = Integer.valueOf(cameraId);
+            int id = Integer.parseInt(cameraId);
 
             /*
              * Get the camera characteristics from the camera service directly if it supports it,