[fenix] Add cleartextPermitted flag

app/src/main/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          package="org.mozilla.fenix">
+          xmlns:tools="http://schemas.android.com/tools" package="org.mozilla.fenix">
 
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
@@ -12,7 +12,9 @@
             android:roundIcon="@mipmap/ic_launcher_round"
             android:supportsRtl="true"
             android:name=".FenixApplication"
-            android:theme="@style/LightAppTheme">
+            android:theme="@style/LightAppTheme"
+            android:usesCleartextTraffic="true"
+            tools:ignore="UnusedAttribute">
         <activity android:name=".HomeActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>