Moved LRResolverRankerService to ExtServices, and added a permission to
ensure that ResolverRankerServices are from trust sources.

Test: manually shared images in Camera, and in PTP to confirm it works
as expected.

Change-Id: I3549292d424fec949e9115faea7a0c5bdec06e87
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 31586d4..fcb28f6 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -3182,6 +3182,14 @@
     <permission android:name="android.permission.BIND_CHOOSER_TARGET_SERVICE"
         android:protectionLevel="signature" />
 
+    <!-- @SystemApi Must be held by services that extend
+         {@link android.service.resolver.ResolverRankerService}.
+         <p>Protection level: signature|privileged
+         @hide
+    -->
+    <permission android:name="android.permission.PROVIDE_RESOLVER_RANKER_SERVICE"
+                android:protectionLevel="signature|privileged" />
+
     <!-- @SystemApi Must be required by services that extend
          {@link android.service.resolver.ResolverRankerService}, to ensure that only the system can
          bind to them.
@@ -3707,14 +3715,6 @@
         <service android:name="com.android.server.PreloadsFileCacheExpirationJobService"
                  android:permission="android.permission.BIND_JOB_SERVICE" >
         </service>
-
-        <service android:name="com.android.internal.app.LRResolverRankerService"
-            android:permission="android.permission.BIND_RESOLVER_RANKER_SERVICE"
-            android:priority="-1" >
-            <intent-filter>
-                <action android:name="android.service.resolver.ResolverRankerService" />
-            </intent-filter>
-        </service>
     </application>
 
 </manifest>