Delete ununsed drawables.

rocket-chat-android-widgets/src/main/res/drawable/autocomplete_background.xml

-<?xml version="1.0" encoding="utf-8"?>
-<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
-    <item>
-        <shape android:shape="rectangle">
-            <solid android:color="@android:color/darker_gray" />
-
-        </shape>
-    </item>
-
-    <item android:bottom="1dp">
-        <shape android:shape="rectangle">
-            <solid android:color="@android:color/white" />
-        </shape>
-    </item>
-
-</layer-list>
\ No newline at end of file

rocket-chat-android-widgets/src/main/res/drawable/ic_add_circle_outline_black_24dp.xml

-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FF000000"
-        android:pathData="M13,7h-2v4L7,11v2h4v4h2v-4h4v-2h-4L13,7zM12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM12,20c-4.41,0 -8,-3.59 -8,-8s3.59,-8 8,-8 8,3.59 8,8 -3.59,8 -8,8z"/>
-</vector>