Disable battery optimization for mail app

    <library name="org.apache.http.legacy"

            file="/system/framework/org.apache.http.legacy.jar" />

    <!-- /e/ default app -->

    <allow-in-power-save package="io.eelo.mail" />

    <!-- These are the standard packages that are white-listed to always have internet

         access while in power save mode, even if they aren't in the foreground. -->

    <allow-in-power-save package="com.android.providers.downloads" />