Add entry provider in SPA framework, which is going to provide entry data for search & hierarchy generation.

Bug: 244122804
Test: manual - build Spa gallery
Change-Id: I57bb80e0749ca62c70abb09510ae8c9b95007c56
diff --git a/packages/SettingsLib/Spa/gallery/AndroidManifest.xml b/packages/SettingsLib/Spa/gallery/AndroidManifest.xml
index e34fedd..e583138 100644
--- a/packages/SettingsLib/Spa/gallery/AndroidManifest.xml
+++ b/packages/SettingsLib/Spa/gallery/AndroidManifest.xml
@@ -35,5 +35,13 @@
             android:name=".GalleryDebugActivity"
             android:exported="true">
         </activity>
+
+        <provider
+            android:name=".GalleryEntryProvider"
+            android:authorities="com.android.spa.gallery.provider"
+            android:enabled="true"
+            android:exported="false">
+        </provider>
+
     </application>
 </manifest>