TeleService: Add support to show call duration when diconnect

Add the strings for the call duration dialog.
Add the method to show the call duration dialog.
Check the setting to decide whether to show the
call duration dialog when disconnect.

Change-Id: I5c5c54469757625e170c072c1b1e77eec5173e67
CSVT : add SIM/MSIM videocall setting menu(code style fix: one tab and two long line)

Change-Id: I739e7da6d7d3d60a9570074b7831ea34a761c43d

Conflicts:
	src/com/android/phone/CallFeaturesSetting.java
TeleService: Add support for IP call prefix

Add a preference screen to edit IP call prefix, and add the
prefix when MO a IP call.

Change-Id: I8c30799d06702eda35c32260998cf72259b7e3d4

Conflicts:
	src/com/android/phone/CallFeaturesSetting.java
TeleService: fix no "speed dial" item in call setting

Add the preference screen of speed dial setting in
call_feature_setting.xml and call_feature_setting_msim.xml

Change-Id: I7a952c9dbd19523e0987483aaaa253d73bcc3262
CRs-Fixed: 727177
TeleService: Add support for ip call prefix

Add a preference screen to edit IP call prefix in
MSimCallFeaturesSubSetting, and add the
prefix when MO a IP call.

Change-Id: I7f823352dcdcdf6ca4c68e9b7ed02c0c3aeb8caf