Omit fdroid debug tests and select the standard flavor by default (#446)

.github/workflows/run-check.yml

@@ -37,7 +37,7 @@ jobs:
       - name: Build and Run Check
         # Run checks while excluding release-build tests, which are not configured to work properly
         # with the Compose testing library.
-        run: ./gradlew check -x testStandardRelease -x testFdroidRelease koverXmlReportStandardDebug
+        run: ./gradlew check -x testStandardRelease -x testFdroidDebug -x testFdroidRelease koverXmlReportStandardDebug
 
       - name: Danger
         env:

app/build.gradle.kts

@@ -53,6 +53,7 @@ android {
     flavorDimensions += listOf("mode")
     productFlavors {
         create("standard") {
+            isDefault = true
             dimension = "mode"
         }
         create("fdroid") {