Attempt to fix fdroid build

capacitor-cordova-android-plugins/cordova.variables.gradle

@@ -0,0 +1,7 @@
+// DO NOT EDIT THIS FILE! IT IS GENERATED EACH TIME "capacitor update" IS RUN
+ext {
+  cdvMinSdkVersion = project.hasProperty('minSdkVersion') ? rootProject.ext.minSdkVersion : 22
+  // Plugin gradle extensions can append to this to have code run at the end.
+  cdvPluginPostBuildExtras = []
+  cordovaConfig = [:]
+}