Enable/disable a few things in debuggable builds

- Feature flag dashboard is now only ON in debuggable builds
- Draw overlay is enabled in debuggable builds for a11y testing

Fixes: 129060539
Fixes: 129041251
Test: robotests
Change-Id: Ic799101c8ca6cbcd26fe02b6a567f223800805ab

src/com/android/settings/core/HideNonSystemOverlayMixin.java

@@ -22,9 +22,11 @@ import static androidx.lifecycle.Lifecycle.Event.ON_START;
 import static androidx.lifecycle.Lifecycle.Event.ON_STOP;
 
 import android.app.Activity;
+import android.os.Build;
 import android.view.Window;
 import android.view.WindowManager;
 
+import androidx.annotation.VisibleForTesting;
 import androidx.lifecycle.LifecycleObserver;
 import androidx.lifecycle.OnLifecycleEvent;
 
@@ -41,9 +43,14 @@ public class HideNonSystemOverlayMixin implements LifecycleObserver {
         mActivity = activity;
     }
 
+    @VisibleForTesting
+    boolean isEnabled() {
+        return !Build.IS_DEBUGGABLE;
+    }
+
     @OnLifecycleEvent(ON_START)
     public void onStart() {
-        if (mActivity == null) {
+        if (mActivity == null || !isEnabled()) {
             return;
         }
         mActivity.getWindow().addSystemFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
@@ -53,7 +60,7 @@ public class HideNonSystemOverlayMixin implements LifecycleObserver {
 
     @OnLifecycleEvent(ON_STOP)
     public void onStop() {
-        if (mActivity == null) {
+        if (mActivity == null || !isEnabled()) {
             return;
         }
         final Window window = mActivity.getWindow();

src/com/android/settings/development/featureflags/FeatureFlagsPreferenceController.java

@@ -17,6 +17,7 @@
 package com.android.settings.development.featureflags;
 
 import android.content.Context;
+import android.os.Build;
 import android.util.FeatureFlagUtils;
 
 import androidx.preference.PreferenceGroup;
@@ -39,7 +40,7 @@ public class FeatureFlagsPreferenceController extends BasePreferenceController
 
     @Override
     public int getAvailabilityStatus() {
-        return AVAILABLE;
+        return Build.IS_DEBUGGABLE ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
     }
 
     @Override