Update test configuration for gradle-managed devices

- Add `allowOldApiLevelDevices` flag to gradle.properties
- Re-enable API level 24 in tests.yml
- Update comment for API level 27 in tests.yml

Author: rfc2822

.github/workflows/tests.yml

@@ -58,8 +58,8 @@ jobs:
     strategy:
       matrix:
         api-level:
-          # - 24  # Android 7 (minSdk level; not supported by gradle-managed devices)
-          - 27  # lowest supported version by GMD
+          - 24  # Android 7 (minSdk level; not supported by gradle-managed devices)
+          # - 27  # the lowest supported version by GMD
           - 30  # Android 11
           - 32  # Android 12L
           - 35  # Android 15

gradle.properties

@@ -13,3 +13,7 @@ org.gradle.caching=true
 android.useAndroidX=true
 # Dokka
 org.jetbrains.dokka.experimental.gradle.pluginMode=V2Enabled
+
+# Automated tests with gradle-managed devices require SDK level 26 by default.
+# Can be removed as soon as minSdk is 26.
+android.experimental.testOptions.managedDevices.allowOldApiLevelDevices=true