Use canary domain to avoid firefox using it's own DoH

Implements #285

app/build.gradle

@@ -148,7 +148,7 @@ dependencies {
     implementation 'com.frostnerd.utilskt:lifecycle:1.2.2'
     implementation 'com.frostnerd.utilskt:preferences:1.5.31' // https://git.frostnerd.com/AndroidUtils/preferenceskt
     implementation 'com.frostnerd.utilskt:navigationdraweractivity:1.4.3' // https://git.frostnerd.com/AndroidUtils/navigationdraweractivity
-    implementation 'com.frostnerd.utilskt:encrypteddnstunnelproxy:2.1.29' // https://git.frostnerd.com/AndroidUtils/encrypteddnstunnelproxy
+    implementation 'com.frostnerd.utilskt:encrypteddnstunnelproxy:2.1.30' // https://git.frostnerd.com/AndroidUtils/encrypteddnstunnelproxy
     implementation 'com.frostnerd.utilskt:general:1.0.26' // https://git.frostnerd.com/AndroidUtils/generalkt
     implementation 'com.frostnerd.utilskt:adapters:1.3.5' // https://git.frostnerd.com/AndroidUtils/Adapters
 

app/src/main/java/com/frostnerd/smokescreen/util/proxy/DnsRuleResolver.kt

@@ -42,6 +42,10 @@ class DnsRuleResolver(context: Context) : LocalResolver(false) {
     private var cachedWildcardResolved = MaxSizeMap<Int, String>(maxWildcardResolvedCacheSize, 30)
     private var cachedNonIncluded = HashSet<Int>(15)
 
+    private val staticRules = mapOf<String, List<Record<*>>>(
+        "use-application-dns.net" to emptyList()
+    )
+
     private var previousRefreshJob:Job? = null
 
     init {
@@ -200,6 +204,9 @@ class DnsRuleResolver(context: Context) : LocalResolver(false) {
     }
 
     override fun canResolve(question: Question): Boolean {
+        if(staticRules.containsKey(question.name?.toString()?.lowercase())) {
+            return true
+        }
         return if ((ruleCount == 0 || (ruleCount != null && ruleCount == whitelistCount)) || (question.type != Record.TYPE.A && question.type != Record.TYPE.AAAA)) {
             false
         } else {
@@ -223,6 +230,9 @@ class DnsRuleResolver(context: Context) : LocalResolver(false) {
     }
 
     override fun resolve(question: Question): List<Record<*>> {
+        if(staticRules.containsKey(question.name?.toString()?.lowercase())) {
+            return staticRules[question.name?.toString()?.lowercase()]!!
+        }
         val result = resolveResults.remove(question.hashCode())
         return result?.let {
             val data = if (question.type == Record.TYPE.A) {