Update backup scheme

<?xml version="1.0" encoding="utf-8"?>

<full-backup-content xmlns:android="http://schemas.android.com/apk/res/android">

<full-backup-content>

    <!-- 1.9.0 Database -->

    <include domain="database" path="launcher_db" />

    <!-- QSB Widgets Database -->

    <include domain="database" path="qsb_widgets.db" />

    <include domain="database" path="qsb_widgets" />

    <include domain="database" path="app_icons.db" />

    <include domain="database" path="launcher.db" />

    <include domain="database" path="launcher_5_by_8.db" />

    <include domain="database" path="launcher_6_by_5.db" />

    <include domain="database" path="launcher_2_by_2.db" />

    <include domain="database" path="launcher_7_by_3.db" />

    <include domain="database" path="launcher_8_by_3.db" />

    <include domain="sharedpref" path="com.android.launcher3.device.prefs.xml" />

    <include domain="sharedpref" path="com.android.launcher3.prefs.xml" />

    <include domain="sharedpref" path="plugin_prefs.xml" />

    <include domain="file" path="downgrade_schema.json" />

</full-backup-content>

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