Center text in the TextView of a RecyclerView row

I have a RecyclerView in my app. Below's an xml code of its row:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://ift.tt/nIICcg"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="48dp">

    <TextView
        android:paddingLeft="-1.5dp"
        android:paddingTop="-1.5dp"
        android:textColor="#fff"
        android:id="@+id/text_with_icon"
        android:layout_gravity="center_vertical"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:text="A"
        android:textAlignment="center"
        android:textSize="22sp"
        android:gravity="center"
        android:background="@drawable/circle"
        android:layout_marginLeft="18dp"
        android:layout_marginStart="18dp"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:textColor="#000"
        android:gravity="center_vertical"
        android:textSize="16sp"
        android:textStyle="bold"
        android:layout_gravity="left|top"
        android:id="@+id/list_title"
        android:layout_marginLeft="72dp"
        android:padding="4dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Dummy text"
        android:layout_marginStart="72dp"
        android:layout_toRightOf="@+id/text_with_icon" />

    <TextView
        android:id="@+id/description"
        android:layout_width="wrap_content"
        android:layout_height="14dp"
        android:layout_marginLeft="77dp"
        android:textStyle="normal"
        android:textColor="#000"
        android:textSize="12sp"
        android:gravity="center_vertical"
        android:text="Lorem ipsum dolor sit amet, consectetur..."
        android:layout_alignLeft="@+id/list_title"
        android:layout_alignStart="@+id/list_title"
        android:layout_alignParentBottom="true"
        android:layout_gravity="left|bottom"
        android:layout_marginBottom="8dp"/>
</FrameLayout>

The Android Studio preview shows that it looks like on the following screenshot:

So, it looks like the letter in the red circle is well centered and here comes the first problem. In the screenshot from an emulator it is easy to notice that all the letters in those circles are not in the center. How can I center them?

And now the second issue. In the emulator screenshot if you look at the third item of the list ("Something3"), it has no description text below the text in bold. Is is possible to vertically center it in the row if there's no description? Circles in the list are backgrounds of the textview and are shapes in separate xml file (circle.xml):

<shape
    xmlns:android="http://ift.tt/nIICcg"
    android:shape="oval">
    <solid android:color="@color/primary"/>
</shape>