#7346 update lint-baseline.xml and remove activity_addons.xml as unused resource

app/lint.xml

@@ -50,7 +50,7 @@
     <!-- Performance: checks we'd like to eventually set to error. -->
     <issue id="UseCompoundDrawables" severity="warning" />
     <issue id="Overdraw" severity="warning" />
-    <issue id="UnusedResources" severity="warning" />
+    <issue id="UnusedResources" severity="error" />
 
     <!-- Performance: checks that we're unsure of the value of that we might want to investigate. -->
     <issue id="UnpackedNativeCode" severity="informational" />

app/src/main/res/layout/activity_addons.xml

@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/container"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:ignore="MergeRootFrame" />