Fix Android package name

This needs to match the name used in the Appstream and/or desktop file for
the nightly build F-Droid repo to pick this up correctly.

# Conflicts:
#	src/android/AndroidManifest.xml

src/android/AndroidManifest.xml

 <?xml version='1.0' encoding='utf-8'?>
-<manifest package="org.kde.kirigamigallery" xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="2.3" android:versionCode="7" android:installLocation="auto">
+<manifest package="org.kde.kirigami2.gallery" xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="2.3" android:versionCode="7" android:installLocation="auto">
 
     <supports-screens android:largeScreens="true" android:normalScreens="true" android:anyDensity="true" android:smallScreens="true"/>
     <application android:hardwareAccelerated="true" android:name="org.qtproject.qt5.android.bindings.QtApplication" android:label="Kirigami Gallery" android:icon="@mipmap/ic_launcher">