Remove OEM config for sim call manager [Telecom part]

This is the telecom part of deleting the OEM config.
See ag/710820 for the overlay part.

We can now set the default sim call manager using the following carrier config:
CarrierConfigManager.KEY_DEFAULT_SIM_CALL_MANAGER_STRING

This CL removes the old OEM config value.

BUG: 21499566
Change-Id: Ib287fa6d2c80b950fa1cb65e98c470fd7290c95c
diff --git a/res/values/config.xml b/res/values/config.xml
index 6c6f215..365e758 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -38,9 +38,4 @@
 
     <!-- Flag indicating if the tty is enabled -->
     <bool name="tty_enabled">false</bool>
-
-    <!-- ComponentName for the default connection manager component. If this cannot be resolved, or
-         if this package has not registered any accounts, then it will be ignored.
-         [DO NOT TRANSLATE] -->
-    <string name="default_connection_manager_component" translatable="false"></string>
 </resources>
diff --git a/src/com/android/server/telecom/PhoneAccountRegistrar.java b/src/com/android/server/telecom/PhoneAccountRegistrar.java
index aa17b14..f2e97bb 100644
--- a/src/com/android/server/telecom/PhoneAccountRegistrar.java
+++ b/src/com/android/server/telecom/PhoneAccountRegistrar.java
@@ -312,12 +312,6 @@
                     CarrierConfigManager.KEY_DEFAULT_SIM_CALL_MANAGER_STRING);
         }
 
-        // Check OEM config. TODO: Remove this once the carrier config value is set.
-        if (TextUtils.isEmpty(defaultSimCallManager)) {
-            defaultSimCallManager = mContext.getResources().getString(
-                    R.string.default_connection_manager_component);
-        }
-
         if (!TextUtils.isEmpty(defaultSimCallManager)) {
             ComponentName componentName = ComponentName.unflattenFromString(defaultSimCallManager);
             if (componentName == null) {