new carrier id API

1. new APIs to getCurrentCarrierId and getCurrentCarrierName
2. new broadcast intent to notify carrier id changed
3. remove unused imports

Bug: 64131637
Test: Build
Change-Id: I3f3ca2eb2c70a50386b1cc626b6b775c1449a4e3
(cherry picked from commit 43304da43ecbc1599b8f33e7fba928ca15676fa5)
Merged-in: I3f3ca2eb2c70a50386b1cc626b6b775c1449a4e3
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 69620cd..53384d9 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -79,6 +79,7 @@
     <protected-broadcast android:name= "com.android.phone.vvm.ACTION_VISUAL_VOICEMAIL_SERVICE_EVENT" />
     <protected-broadcast android:name= "com.android.internal.telephony.CARRIER_VVM_PACKAGE_INSTALLED" />
     <protected-broadcast android:name= "com.android.cellbroadcastreceiver.GET_LATEST_CB_AREA_INFO" />
+    <protected-broadcast android:name= "android.intent.action.CURRENT_CARRIER_IDENTITY_CHANGED" />
 
     <uses-permission android:name="android.permission.BROADCAST_STICKY" />
     <uses-permission android:name="android.permission.CALL_PHONE" />