Does an Android Library need a manifest ,app_name,Icon?

Any android library needs to have an AndroidManifest.xml file, but a name or an icon is not required. It’s only needed when there is an activity that is MAIN and LAUNCHER.

You simply could use this manifest and your library will work like a charm.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="[your package]"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="[min supported version]" />

    <application/>

</manifest>