diff --git a/packages/SystemUI/Android.bp b/packages/SystemUI/Android.bp
index fabc524..d7e4d72 100644
--- a/packages/SystemUI/Android.bp
+++ b/packages/SystemUI/Android.bp
@@ -50,6 +50,16 @@
     srcs: ["src/com/android/systemui/EventLogTags.logtags"],
 }
 
+filegroup {
+    name: "ReleaseJavaFiles",
+    srcs: ["src/com/android/systemui/flags/FeatureFlagManager.java"],
+}
+
+filegroup {
+    name: "DebugJavaFiles",
+    srcs: ["src-debug/com/android/systemui/flags/FeatureFlagManager.java"],
+}
+
 android_library {
     name: "SystemUI-core",
     srcs: [
@@ -57,6 +67,12 @@
         "src/**/*.java",
         "src/**/I*.aidl",
     ],
+    product_variables: {
+        debuggable: {
+            srcs: [":DebugJavaFiles"],
+            exclude_srcs: [":ReleaseJavaFiles"],
+        },
+    },
     resource_dirs: [
         "res-product",
         "res-keyguard",
diff --git a/packages/SystemUI/src-debug/com/android/systemui/flags/FeatureFlagManager.java b/packages/SystemUI/src-debug/com/android/systemui/flags/FeatureFlagManager.java
new file mode 100644
index 0000000..5c4f08e
--- /dev/null
+++ b/packages/SystemUI/src-debug/com/android/systemui/flags/FeatureFlagManager.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.flags;
+import android.util.ArraySet;
+
+import com.android.systemui.dagger.SysUISingleton;
+
+/**
+ * Concrete implementation of the a Flag manager that returns default values for debug builds
+ */
+@SysUISingleton
+public class FeatureFlagManager {
+    public boolean isEnabled(int key, boolean defaultValue) {
+        return isEnabled(Integer.toString(key), defaultValue);
+    }
+
+    public boolean isEnabled(String key, boolean defaultValue) {
+        // TODO
+        return false;
+    }
+
+    public void setEnabled(int key, boolean value) {
+        setEnabled(Integer.toString(key), value);
+    }
+
+    public void setEnabled(String key, boolean value) {
+        // TODO
+    }
+}
\ No newline at end of file
diff --git a/packages/SystemUI/src/com/android/systemui/flags/FeatureFlagManager.java b/packages/SystemUI/src/com/android/systemui/flags/FeatureFlagManager.java
new file mode 100644
index 0000000..dc09f2a
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/flags/FeatureFlagManager.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.flags;
+
+import com.android.systemui.dagger.SysUISingleton;
+
+/**
+ * Default implementation of the a Flag manager that returns default values for release builds
+ */
+@SysUISingleton
+public class FeatureFlagManager {
+    public boolean getBoolean(int key, boolean defaultValue) {
+        return defaultValue;
+    }
+    public void setBoolean(int key, boolean value) {}
+    public boolean getBoolean(String key, boolean defaultValue) {
+        return defaultValue;
+    }
+    public void setBoolean(String key, boolean value) {}
+    public void addFlagChangedListener(Runnable run) {}
+    public void removeFlagUpdatedListener(Runnable run) {}
+}