desugaring is mandatory for old android version to avoid

avoids NoClassDefFoundError: Failed resolution of: Ljava/time/Duration missing in android java classes

avoids $ExternalSyntheticLambda1

See nova-video-player/aos-AVP#829
See hierynomus/smbj#807
See jupnp/jupnp#236

build.gradle

@@ -55,6 +55,7 @@ android {
     }
 
     compileOptions {
+        coreLibraryDesugaringEnabled true
         sourceCompatibility JavaVersion.VERSION_17
         targetCompatibility JavaVersion.VERSION_17
     }
@@ -100,12 +101,11 @@ configurations.configureEach {
 }
 
 dependencies {
+    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.0.4'
     api 'eu.agno3.jcifs:jcifs-ng:2.1.10'
     api 'com.github.mwiede:jsch:0.2.17'
-    // update to 3.9.0 (java 7->8) breaks ftp on firestick4k (not max) had to use 3.8.0
-    // https://commons.apache.org/proper/commons-net/release-notes.html need to stick with java7: max 3.8.0
-    // versions of commons-net otherwise we get java.time.Duration ClassNotFoundException even with threetenabp
-    implementation 'commons-net:commons-net:3.8.0'
+    // desugar is needed no avoid  commons-net java.time.Duration ClassNotFoundException after 3.8.0
+    implementation 'commons-net:commons-net:3.10.0'
     implementation 'com.jakewharton.threetenabp:threetenabp:1.4.7'
     implementation 'com.github.nova-video-player:sardine-android:0.0.3'
     implementation 'com.hierynomus:smbj:0.13.0'