Bump to 85 / 1.50.1.

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

    xmlns:tools="http://schemas.android.com/tools"

    package="net.sourceforge.opencamera"

    android:versionCode="84"

    android:versionName="1.50"

    android:versionCode="85"

    android:versionName="1.50.1"

    android:installLocation="auto"

    tools:ignore="GoogleAppIndexingWarning">

    <!-- ignore GoogleAppIndexingWarning as we don't want to implement that -->