feat: introduce extended integration tests

- test both FLOSS and non-floss builds
- test on Synapse, Dendrite and Conduit
- remove Synapse-specific test
- add static Release mode app launch test

Signed-off-by: TheOneWithTheBraid <the-one@with-the-braid.cf>

scripts/integration-check-release-build.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+# generate a temporary signing key adn apply its configuration
+cd android
+KEYFILE="$(pwd)/key.jks"
+echo "Generating signing configuration with $KEYFILE..."
+keytool -genkey -keyalg RSA -alias key -keysize 4096 -dname "cn=FluffyChat CI, ou=Head of bad integration tests, o=FluffyChat HQ, c=TLH" -keypass FLUFFYCHAT -storepass FLUFFYCHAT -validity 1 -keystore "$KEYFILE" -storetype "pkcs12"
+echo "storePassword=FLUFFYCHAT" >> key.properties
+echo "keyPassword=FLUFFYCHAT" >> key.properties
+echo "keyAlias=key" >> key.properties
+echo "storeFile=$KEYFILE" >> key.properties
+ls | grep key
+cd ..
+
+# build release mode APK
+flutter pub get
+flutter build apk --release
+
+# install and launch APK
+flutter install
+adb shell am start -n chat.fluffy.fluffychat/chat.fluffy.fluffychat.MainActivity
+
+sleep 5
+
+# check whether FluffyChat runs
+adb shell ps | awk '{print $9}' | grep chat.fluffy.fluffychat