sanders: Switch from add_lunch_combo to COMMON_LUNCH_CHOICES

Signed-off-by: ronaxdevil <pratabidya.007@gmail.com>

AndroidProducts.mk

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2017-2018 The LineageOS Project
+# Copyright (C) 2017-2019 The LineageOS Project
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -15,3 +15,8 @@
 
 PRODUCT_MAKEFILES := \
 	$(LOCAL_DIR)/lineage_sanders.mk
+
+COMMON_LUNCH_CHOICES := \
+    lineage_sanders-user \
+    lineage_sanders-userdebug \
+    lineage_sanders-eng