feat: add dnscheck to experimental (#477)

This diff adds dnscheck to experimental. Originally, in the related PR
(#477) we also added support
for torsf. But that has been backed out until we figure out exactly the
correct configuration (ooni/probe#2004).

Reference issue: ooni/probe#1973).

Co-authored-by: Norbel Ambanumben <aanorbel@gmail.com>

app/src/main/java/org/openobservatory/ooniprobe/test/suite/ExperimentalSuite.java

@@ -30,6 +30,9 @@ public ExperimentalSuite() {
         if (super.getTestList(pm) == null) {
             ArrayList<AbstractTest> list = new ArrayList<>();
             list.add(new Experimental("stunreachability"));
+            list.add(new Experimental("dnscheck"));
+            // TODO: add once torsf is considered stable
+            //  list.add(new Experimental("torsf"));
             super.setTestList(list.toArray(new AbstractTest[0]));
         }
         return super.getTestList(pm);

engine/build.gradle

@@ -31,8 +31,8 @@ android {
 dependencies {
     // For the stable and dev app flavours we're using the library
     // build published at Maven Central.
-    stableImplementation 'org.ooni:oonimkall:2021.12.14-160025'
-    devImplementation 'org.ooni:oonimkall:2021.12.14-160025'
+    stableImplementation 'org.ooni:oonimkall:2022.01.24-135942'
+    devImplementation 'org.ooni:oonimkall:2022.01.24-135942'
 
     // For the experimental flavour, you need to compile your own
     // oonimkall.aar and put it into the ../engine-experimental dir