Add support for flag change listeners library.

Bug: 203548827
Test: manual
Change-Id: I6f989e89a98c7c6643af762eb0263f81ce584dfa
diff --git a/packages/SystemUI/Android.bp b/packages/SystemUI/Android.bp
index 16a6a46..eae6f27 100644
--- a/packages/SystemUI/Android.bp
+++ b/packages/SystemUI/Android.bp
@@ -83,8 +83,7 @@
         "src/**/*.kt",
         "src/**/*.java",
         "src/**/I*.aidl",
-        "src-release/**/*.kt",
-        "src-release/**/*.java",
+        ":ReleaseJavaFiles",
     ],
     product_variables: {
         debuggable: {