Declared ONSProfileResultReceiver as protected-broadcast so that, only system can send this broadcast.

Bug: 211962198
Test: Manual. Connect the device to internet and insert CBRS pSIM. After download complete (Log: 'EuiccServiceImpl.onDownloadSubscription: onDownloadSubscription') Below logs should not be observed.
'Sending non-protected broadcast com.android.ons.ONSProfileResultReceiver.CALLBACK'

Change-Id: Iada19ba141f1b5170f1e79f73f2c953aeb28d492
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 6f9a858..770de9e 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -21,6 +21,8 @@
           android:process="com.android.phone"
           android:sharedUserId="android.uid.phone">
 
+    <protected-broadcast android:name="com.android.ons.ONSProfileResultReceiver.CALLBACK" />
+
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
     <application
         android:process="com.android.phone"