[SEPolicy][sota_app]Move sota_app to gs-common.

- Refer to go/pixel-defrag.

Bug: 287167439
Test: Forrest build to verify pass.
Change-Id: I4279dfcdb56684332e617f073ed5efc191a53390
diff --git a/sota_app/factoryota.mk b/sota_app/factoryota.mk
new file mode 100644
index 0000000..14ed2b5
--- /dev/null
+++ b/sota_app/factoryota.mk
@@ -0,0 +1,4 @@
+PRODUCT_PACKAGES += \
+    FactoryOtaPrebuilt
+
+SYSTEM_EXT_PRIVATE_SEPOLICY_DIRS += device/google/gs-common/sota_app/sepolicy/system_ext