I'm trying to create an effect similar to what you see in the gif where there is play.

I do not know if you understand well but it seems a kind of ripple but done in a circular, such as the one on the videos of the app of youtube.
So I tried like this:
<LinearLayout
        android:id="@+id/play_pause_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center">
        <ImageView
            android:id="@id/exo_play"
            android:layout_width="50dp"
            android:layout_height="50dp"
            android:background="@drawable/background_item_selected"
            android:clickable="true"
            android:contentDescription="@string/play"
            android:focusable="true"
            android:src="@drawable/ic_play_36dp" />
        <ImageView
            android:id="@id/exo_pause"
            android:layout_width="50dp"
            android:layout_height="50dp"
            android:background="@drawable/background_item_selected"
            android:clickable="true"
            android:contentDescription="@string/pause"
            android:focusable="true"
            android:src="@drawable/ic_pause_36dp" />
    </LinearLayout>
background_item_selected:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="false">
        <shape android:shape="oval">
            <solid android:color="@color/colorAccent" />
        </shape>
    </item>
    <item android:state_pressed="true">
        <shape android:shape="oval">
            <solid android:color="@android:color/transparent" />
        </shape>
    </item>
</layer-list>
But I can not get the desired effect.