Changing target sdk to Q

<manifest

    xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.android.launcher3">

    <uses-sdk android:targetSdkVersion="28" android:minSdkVersion="25"/>

    <uses-sdk android:targetSdkVersion="29" android:minSdkVersion="25"/>

    <!--

    Manifest entries specific to Launcher3. This is merged with AndroidManifest-common.xml.

    Refer comments around specific entries on how to extend individual components.