Remove the wallpapers from the all apps list.  They're not in Dev Tools.
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 685ec59..9768338 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -34,7 +34,7 @@
 
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
+                <category android:name="android.intent.category.TEST" />
             </intent-filter>
 
         </activity>
@@ -46,7 +46,7 @@
 
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
+                <category android:name="android.intent.category.TEST" />
             </intent-filter>
 
         </activity>
@@ -58,7 +58,7 @@
 
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
+                <category android:name="android.intent.category.TEST" />
             </intent-filter>
 
         </activity>