create getModemEnabled function in PhoneConfigurationManager

Bug: 124402911
Test: build
Change-Id: I7b22c5b0dbe95a8e5be2e0cbf3199841d275dac7

telephony/java/com/android/internal/telephony/RILConstants.java

@@ -470,6 +470,7 @@ public interface RILConstants {
     int RIL_REQUEST_START_KEEPALIVE = 144;
     int RIL_REQUEST_STOP_KEEPALIVE = 145;
     int RIL_REQUEST_ENABLE_MODEM = 146;
+    int RIL_REQUEST_GET_MODEM_STATUS = 147;
 
     /* The following requests are not defined in RIL.h */
     int RIL_REQUEST_HAL_NON_RIL_BASE = 200;