Disabling incoming call function.

Also fix un-used imports in several files.

Change-Id: Ife01674b2a1fe807a8d0b23c984e46715fc08908
diff --git a/src/com/android/phone/PhoneInterfaceManager.java b/src/com/android/phone/PhoneInterfaceManager.java
index 6600ae5..c65c4f8 100644
--- a/src/com/android/phone/PhoneInterfaceManager.java
+++ b/src/com/android/phone/PhoneInterfaceManager.java
@@ -311,7 +311,7 @@
                 intent = PhoneGlobals.createInCallIntent();
             }
             try {
-                mApp.startActivity(intent);
+                //mApp.startActivity(intent);
             } catch (ActivityNotFoundException e) {
                 // It's possible that the in-call UI might not exist
                 // (like on non-voice-capable devices), although we