Whitelist READ_PRIVILEGED_PHONE_STATE for the contacts provider

In Android 10 access to device identifiers was moved from a runtime
permission to the privileged READ_PRIVILEGED_PHONE_STATE permission.
One of the non-resettable identifiers missed was SubscriptionInfo#
getIccId. The contacts provider currently uses this ID to upgrade
to version 1003 of the database; to ensure there are no issues with
this upgrade this permission is being whitelisted for the contacts
provider.

Bug: 131909991
Bug: 173421434
Test: atest ContactsProviderTests
Change-Id: I7574f787a7e55aa0337237b9fe916ee143a2f697
Merged-In: I7574f787a7e55aa0337237b9fe916ee143a2f697

data/etc/privapp-permissions-platform.xml

@@ -177,6 +177,7 @@ applications that come with the platform
         <permission name="android.permission.GET_ACCOUNTS_PRIVILEGED"/>
         <permission name="android.permission.INTERACT_ACROSS_USERS"/>
         <permission name="android.permission.MANAGE_USERS"/>
+        <permission name="android.permission.READ_PRIVILEGED_PHONE_STATE"/>
         <permission name="android.permission.UPDATE_APP_OPS_STATS"/>
         <permission name="android.permission.USE_RESERVED_DISK"/>
     </privapp-permissions>