Flag activities for bubbles shortcut

Put activities behind a flag in the manifest.

Bug: 340337839
Flag: com.android.wm.shell.enable_retrievable_bubbles
Test: m droid
Change-Id: I8256e9daac8d0071173e44d52de499e2acd70211
diff --git a/libs/WindowManager/Shell/AndroidManifest.xml b/libs/WindowManager/Shell/AndroidManifest.xml
index 52ae93f..bbbc23e 100644
--- a/libs/WindowManager/Shell/AndroidManifest.xml
+++ b/libs/WindowManager/Shell/AndroidManifest.xml
@@ -34,6 +34,7 @@
 
         <activity
             android:name=".bubbles.shortcut.CreateBubbleShortcutActivity"
+            android:featureFlag="com.android.wm.shell.enable_retrievable_bubbles"
             android:exported="true"
             android:excludeFromRecents="true"
             android:theme="@android:style/Theme.NoDisplay"
@@ -47,6 +48,7 @@
 
         <activity
             android:name=".bubbles.shortcut.ShowBubblesActivity"
+            android:featureFlag="com.android.wm.shell.enable_retrievable_bubbles"
             android:exported="true"
             android:excludeFromRecents="true"
             android:theme="@android:style/Theme.NoDisplay" >