Fix stuck dialogs and crashes after config changes in additional call settings and call forwarding settings

Ignore orientation and keyboard visibility changes in these settings activities since the UI doesn't change in those cases and the activity doesn't manage asynchronous tasks correctly across multiple instances.

Bug: 2372307
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 38700eb..6f63f49 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -256,14 +256,16 @@
         </activity>
 
         <activity android:name="GsmUmtsCallForwardOptions"
-            android:label="@string/labelCF">
+            android:label="@string/labelCF"
+            android:configChanges="orientation|keyboardHidden">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
             </intent-filter>
         </activity>
 
         <activity android:name="GsmUmtsAdditionalCallOptions"
-            android:label="@string/labelGSMMore">
+            android:label="@string/labelGSMMore"
+            android:configChanges="orientation|keyboardHidden">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
             </intent-filter>