Using ImageView and match_parent with splash screen on Android

Question

I can't find a way to simply make my vector image 2/3 of the screen size without the madness with defining dimens.xml and using Java/Kotlin code.

Is it really impossible?

My current implementation of my splash screen:

drawable/splash.xml:

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="rectangle" >
            <solid android:color="#FFFFFF"/>
        </shape>
    </item>
    <item android:drawable="@drawable/background0"
        android:width="@dimen/logoSize"
        android:height="@dimen/logoSize"
        android:gravity="center"/>
</layer-list>

values/dimens.xml:

<resources>
    <dimen name="logoSize">240dp</dimen>
</resources>

values/apptheme.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="AppTheme" parent="@android:style/Theme.DeviceDefault.Light.NoActionBar">
        <item name="android:windowBackground">@drawable/splash</item>
    </style>
</resources>

AndroidManifest.xml:

    <activity android:name="com.myapp.MainActivity"
        android:configChanges="orientation|uiMode|screenLayout|screenSize|smallestScreenSize|layoutDirection|locale|fontScale|keyboard|keyboardHidden|navigation|mcc|mnc|density"
        android:label="@string/app_name"
        android:theme="@style/AppTheme"

it looks like this:

but when I try to replace drawable/splash.xml with:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/background0"
        />
</LinearLayout>

green image does not appear. Is it possible to fix this?

Or probably is there some other way to use something like match_parent+padding with splash screen image, but make the image square somehow?

EDIT1 There is

android:scaleType="fitCenter"

but it works with ImageView, see Scale image keeping its aspect ratio in background drawable

EDIT2

Tried to add match_parent to my vector image:

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="match_parent"
    android:height="match_parent"
    android:viewportWidth="1000"
    android:viewportHeight="1000">
    ...

but got build errors:

AAPT: error: 'match_parent' is incompatible with attribute height (attr) dimension.
AAPT: error: 'match_parent' is incompatible with attribute width (attr) dimension.