Reorganize phone account settings.

+ Added new fragment for phone account settings.
+ Added new activity for phone account settings, which launches this
fragment. I would have prefered to specify a fragment on the
PreferenceScreen in call_feature_setting.xml, but I couldn't get it
to work so I dispatch an intent to start a new activity instead. I
think the preferred option doesn't work because CallFeatureSetting
is still stuck in the old PreferenceActivity model.
+ Added new activity to the manifest file.
+ Moved the default outgoing call, call assistant, and "use SIP
calling settings" into new PhoneAccountSettingsFragment.
- Deleting code for implementing those in CallFeaturesSetting.
+ Added code to AccountSelectionPreference to disable updating of the
summary, and firing and event after the value has been changed when
an account is selected.

Bug: 17487262
Change-Id: I126806ef8e70f8323a7ff143863dacffeb502eaa
diff --git a/sip/res/xml/sip_setting.xml b/sip/res/xml/sip_setting.xml
index f66e5e4..91b8311 100644
--- a/sip/res/xml/sip_setting.xml
+++ b/sip/res/xml/sip_setting.xml
@@ -14,13 +14,13 @@
      limitations under the License.
 -->
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
-        android:title="@string/sip_accounts">
+    android:title="@string/sip_accounts">
 
     <CheckBoxPreference
-            android:key="sip_receive_calls_key"
-            android:title="@string/sip_receive_calls"
-            android:summary="@string/sip_receive_calls_summary"
-            android:persistent="true"/>
+        android:key="sip_receive_calls_key"
+        android:title="@string/sip_receive_calls"
+        android:summary="@string/sip_receive_calls_summary"
+        android:persistent="true"/>
 
     <PreferenceCategory android:key="sip_account_list" android:title="@string/sip_account_list"/>