Vendor: Add common-tablet.mk and common-tablet overlay

Change-Id: Iba072a50ce2167694c43a53175287c9e153477ec
diff --git a/config/common_tablet.mk b/config/common_tablet.mk
new file mode 100644
index 0000000..829bfa1
--- /dev/null
+++ b/config/common_tablet.mk
@@ -0,0 +1,8 @@
+# Common settings and files
+-include vendor/omni/config/common.mk
+
+# Add tablet overlays
+PRODUCT_PACKAGE_OVERLAYS += vendor/omni/overlay/common_tablet
+
+PRODUCT_CHARACTERISTICS := tablet
+