Prevent building T+ sources on sc-mainline-prod

Points service-connectivity-tiramisu-sources to empty stubs instead.

Test: TH
Merged-In: I06e2568e5e01d855783383552d1b0d7732cefbe0
Change-Id: I6a9ce3d6f6f430576c54fa1171b43d2dff18e6e0
diff --git a/service-t/Android.bp b/service-t/Android.bp
index 0beb4c8..5d7684d 100644
--- a/service-t/Android.bp
+++ b/service-t/Android.bp
@@ -20,12 +20,17 @@
 }
 
 // Include build rules from Sources.bp
-build = ["Sources.bp"]
+// sc-mainline-prod only: do not include Sources.bp
+// build = ["Sources.bp"]
 
 filegroup {
     name: "service-connectivity-tiramisu-sources",
     srcs: [
-        "src/**/*.java",
+        // sc-mainline-prod only: Building T sources is disabled on this branch.
+        // "src/**/*.java",
+        "src/com/android/server/ConnectivityServiceInitializer.java",
+        // filegroup contains empty stubs on sc-mainline-prod.
+        ":services.connectivity-tiramisu-updatable-sources",
     ],
     visibility: ["//visibility:private"],
 }