soong: Add TARGET_USES_QTI_CAMERA_DEVICE

Change-Id: I925b137edeed9fa11bbe566002147b444328c661
diff --git a/build/soong/android/variable.go b/build/soong/android/variable.go
index 781f3bf..4b905d9 100644
--- a/build/soong/android/variable.go
+++ b/build/soong/android/variable.go
@@ -12,6 +12,10 @@
 	Uses_qcom_bsp_legacy struct {
 		Cppflags []string
 	}
+	Uses_qti_camera_device struct {
+		Cppflags []string
+		Shared_libs []string
+	}
 }
 
 type ProductVariables struct {
@@ -20,4 +24,5 @@
 	Target_shim_libs  *string `json:",omitempty"`
 	Uses_generic_camera_parameter_library  *bool `json:",omitempty"`
 	Uses_qcom_bsp_legacy  *bool `json:",omitempty"`
+	Uses_qti_camera_device  *bool `json:",omitempty"`
 }