Clean up import in homepage

- Update import for MetricsProto to SettingsEnums
- Remove unused import
- Sort import

Fixes: 131885942
Test: robotests
Change-Id: I9a5e06adaa19bac9c082f53f1c627356be7148d8

src/com/android/settings/homepage/contextualcards/slices/SliceFullCardRendererHelper.java

@@ -19,7 +19,6 @@ package com.android.settings.homepage.contextualcards.slices;
 import android.app.settings.SettingsEnums;
 import android.content.Context;
 import android.view.View;
-import android.widget.LinearLayout;
 
 import androidx.recyclerview.widget.RecyclerView;
 import androidx.slice.Slice;