gs101: refactor changes into separate BoardConfig

thanks to @CalyxOS for remininding me about that

Change-Id: I66ac6344ad5d3a2534d67c0683ed944ebcec692b
diff --git a/device-omni.mk b/device-omni.mk
new file mode 100644
index 0000000..74e15bc
--- /dev/null
+++ b/device-omni.mk
@@ -0,0 +1,3 @@
+# EUICC
+PRODUCT_PACKAGES += \
+    EuiccSupportPixelOverlay
\ No newline at end of file