camera: Configure streams immediately when API2 does configuration

This makes the configuration more eager (no more waiting until the first
request) and also allows any errors to immediately be sent back to the
client.

Bug: 16629195
Change-Id: I0c365bc8f760466916dcc089217a43c43f9f4c9d
diff --git a/services/camera/libcameraservice/device3/Camera3Device.h b/services/camera/libcameraservice/device3/Camera3Device.h
index 7656237..e071cc2 100644
--- a/services/camera/libcameraservice/device3/Camera3Device.h
+++ b/services/camera/libcameraservice/device3/Camera3Device.h
@@ -114,6 +114,8 @@
     virtual status_t deleteStream(int id);
     virtual status_t deleteReprocessStream(int id);
 
+    virtual status_t configureStreams();
+
     virtual status_t createDefaultRequest(int templateId, CameraMetadata *request);
 
     // Transitions to the idle state on success