When I want to insert the follow meta-tag:
I moved such strings to globalstrings.xml and removed the references from the locale files.
Variation of resources in AndroidManifest.xml is detected as error.
It may be ignored like this:
<?xml version="1.0" encoding="utf-8"?>
<manifest ...
xmlns:tools="http://schemas.android.com/tools"
...>
...
<meta-data
android:name="com.android.systemui.action_assist_icon"
android:resource="@mipmap/ic_launcher"
tools:ignore="ManifestResource" />
...
</manifest>
see: Android : Facebook app id showing error in values-ta/strings.xml and can't able to generate signed apk