Allow mainline modules to set private window flags

We need to prevent apps from trying to decorate the permission grant
requests. Hence the the permission controller app (which will become a
mainline module) will need to set the
PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS private window flag.

Test: Built
Bug: 110953302
Change-Id: I7dfed6aac8ec487ac0665ad33c2892cad416224a

1 files changed, 13 insertions, 2 deletions

diff --git a/core/java/android/view/Window.java b/core/java/android/view/Window.java
index a7ec6df00017..982737aedc74 100644
--- a/core/java/android/view/Window.java
+++ b/core/java/android/view/Window.java
@@ -25,6 +25,7 @@ import android.annotation.LayoutRes;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.StyleRes;
+import android.annotation.SystemApi;
 import android.annotation.UnsupportedAppUsage;
 import android.app.WindowConfiguration;
 import android.content.Context;
@@ -1079,8 +1080,18 @@ public abstract class Window {
         setFlags(flags, flags);
     }
 
-    /** @hide */
-    @UnsupportedAppUsage
+    /**
+     * Add private flag bits.
+     *
+     * <p>Refer to the individual flags for the permissions needed.
+     *
+     * <p>Note: Only for updateable system components (aka. mainline modules)
+     *
+     * @param flags The flag bits to add.
+     *
+     * @hide
+     */
+    @SystemApi
     public void addPrivateFlags(int flags) {
         setPrivateFlags(flags, flags);
     }