API Review PhoneManager -> TelecommManager. Rename methods (1/6)

PhoneManager
- handlePinMMI docs should explain what a Pin is and what MMI is
- rename isInAPhoneCall to isInCall
- rename showCallScreen to showInCallScreen
- merge this class into TelecommManager, we don't need both

Bug: 16960458

Change-Id: I6d1939175c0292641f6ece0b630db8a864871d7e
diff --git a/src/com/android/dialer/SpecialCharSequenceMgr.java b/src/com/android/dialer/SpecialCharSequenceMgr.java
index 4a6e4b2..0b6e881 100644
--- a/src/com/android/dialer/SpecialCharSequenceMgr.java
+++ b/src/com/android/dialer/SpecialCharSequenceMgr.java
@@ -27,8 +27,8 @@
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.Looper;
-import android.phone.PhoneManager;
 import android.provider.Settings;
+import android.telecomm.TelecommManager;
 import android.telephony.PhoneNumberUtils;
 import android.telephony.TelephonyManager;
 import android.util.Log;
@@ -225,9 +225,9 @@
 
     static boolean handlePinEntry(Context context, String input) {
         if ((input.startsWith("**04") || input.startsWith("**05")) && input.endsWith("#")) {
-            PhoneManager phoneManager =
-                    (PhoneManager) context.getSystemService(Context.PHONE_SERVICE);
-            return phoneManager.handlePinMmi(input);
+            TelecommManager telecommManager =
+                    (TelecommManager) context.getSystemService(Context.TELECOMM_SERVICE);
+            return telecommManager.handleMmi(input);
         }
         return false;
     }