Timer for on/off Android support

Most of them, yes.

However, you can either invent a new Permission file:

e.g. /etc/sailjail/permissions/AndroidControl.permission

# BEG systembus-com.jolla.apkd
dbus-system.talk com.jolla.apkd
dbus-system.call com.jolla.apkd=com.jolla.apkd.controlService@/*
# END systembus-com.jolla.apkd

and then include that in the apps .desktop file permission list:

[...]
[X-Sailjail]
ApplicationName=my-android-control-app
OrganizationName=my-organization
Permissions=AndroidControl

OR you can create an application profile, e.g.

e.g. /etc/sailjail/permissions/my-android-control-app.profile

# -*- mode: sh -*-

# Firejail profile for /usr/bin/my-android-control-app

# x-sailjail-translation-catalog = my-android-control-app
# x-sailjail-translation-key-description = my-android-control-app-la-name
# x-sailjail-description = Android Control
# x-sailjail-translation-key-long-description = my-android-control-permission-la-data_description
# x-sailjail-long-description = Start and stop AppSupport

### PERMISSIONS
# x-sailjail-permission = Privileged

# BEG systembus-com.jolla.apkd
dbus-system.talk com.jolla.apkd
dbus-system.call com.jolla.apkd=com.jolla.apkd.controlService@/*
# END systembus-com.jolla.apkd