Force sooner/generic/sim to use camera stub only.

Change-Id: Ie3251e3801cd09b3f373bbd4afb5fda82a0c5818
diff --git a/camera/libcameraservice/Android.mk b/camera/libcameraservice/Android.mk
index 624b23a..a0d6ee1 100644
--- a/camera/libcameraservice/Android.mk
+++ b/camera/libcameraservice/Android.mk
@@ -2,6 +2,11 @@
 
 # Set USE_CAMERA_STUB if you don't want to use the hardware camera.
 
+# force these builds to use camera stub only
+ifneq ($(filter sooner generic sim,$(TARGET_DEVICE)),)
+  USE_CAMERA_STUB:=true
+endif
+
 ifeq ($(USE_CAMERA_STUB),true)
   INCLUDE_CAMERA_STUB:=true
   INCLUDE_CAMERA_HARDWARE:=false