SystemUI(DSDS): Add StatusBar support for DSDS
SystemUI(DSDS): Use proper variable in multi SIM disabled cases
Use the mNetworkController instead of mMSimNetworkController while
adding the status bar icons if multi sim is not enabled.
frameworks/base (DSDS): Add fixes for DSDS
   Telephony: Add the return values for getSimState().
    - Add the return values for function getSimState().
    - Set the state and PROPERTY_SIM_STATE properly in
      MSimIccCardProxy.
    - Correct the log statements in MSimIccCardProxy.
    - Split the long lines in MSimIccCardProxy.

    Telephony : Add api getSimSerialNumber to MSimTelephonyManager.

    Telephony: Use proper Telephony Service
     - Use proper telephony services based on the multi sim enabled property
     - Use proper telephony service in NetworkController.

    Telephony: Delay the RADIO_POWER off till the data disconnect
     - Changes to make sure that all the data connections are disconnected
       before sending the RADIO_POWER OFF on both the subscriptions in case
       of DSDS.
Telephony (DSDS): Write proper socket data to RILD socket
In DSDS with multi RILD architecture each of the telephony
clients to write SUB1 string to RILD socket so that RILD
can derive proper client id information on RILD side.