Add Slices for Enhanced 4G LTE

Add Slices for Enhanced 4G LTE
Enhanced 4G LTE Slice Provider:
Create slice to display appropriate message with further instructions
Enhanced 4G LTE Slice Broadcast Reciver:
1. Change the setting via ImsManager
2. Ask to requery the slice in one second to display updated settings if 1 is valid or display appropriate message

Bug: 79270171
Test: Robotests
Test: Use support-slices-demos-debug.apk to test on device
Change-Id: I48d412de94d5d9f1ad42a299691ec5cf8001c6a1

src/com/android/settings/slices/SlicesFeatureProviderImpl.java

@@ -2,6 +2,7 @@ package com.android.settings.slices;
 
 import android.content.Context;
 
+import com.android.settings.mobilenetwork.Enhanced4gLteSliceHelper;
 import com.android.settings.wifi.calling.WifiCallingSliceHelper;
 import com.android.settingslib.utils.ThreadUtils;
 
@@ -45,4 +46,9 @@ public class SlicesFeatureProviderImpl implements SlicesFeatureProvider {
     public WifiCallingSliceHelper getNewWifiCallingSliceHelper(Context context) {
         return new WifiCallingSliceHelper(context);
     }
+
+    @Override
+    public Enhanced4gLteSliceHelper getNewEnhanced4gLteSliceHelper(Context context) {
+        return new Enhanced4gLteSliceHelper(context);
+    }
 }