ExactCalculator: Clean-up and update manifest

        android:appCategory="productivity"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:windowSoftInputMode="stateAlwaysHidden"

        android:supportsRtl="true">

        <activity

            android:name=".Calculator"

            android:label="@string/app_name"

            android:launchMode="singleTask"

            android:exported="true"

            android:theme="@style/Theme.Calculator">

            <layout

                android:minHeight="220dp"

                android:minWidth="230dp" />

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

    <style name="Theme" parent="Theme.Material3.DayNight">

        <item name="android:statusBarColor">@color/display_background_color</item>

        <item name="android:windowLightStatusBar">?isLightTheme</item>

        <item name="android:windowSoftInputMode">stateAlwaysHidden</item>

        <item name="android:navigationBarColor">?colorSurface</item>

        <item name="android:windowLightNavigationBar">?isLightTheme</item>

    </style>