update DoH support to use Cloudflare and extend timeouts

app/src/main/java/info/guardianproject/keanu/core/MatrixNetworkInterceptor.kt

@@ -9,27 +9,33 @@ import okhttp3.Response
 import okhttp3.dnsoverhttps.DnsOverHttps
 import java.io.File
 import java.net.InetAddress
+import java.util.concurrent.TimeUnit
 
 open class MatrixNetworkInterceptor : Interceptor {
 
-    private var dohGoog : Dns
-    private var dohClient : OkHttpClient
+    private var dohClient : Dns
+    private var okClient : OkHttpClient
 
     init {
         //initialize DNS over HTTPS client using Google DNS
         val appCache = Cache(File("cacheDir", "okhttpcache"), 10 * 1024 * 1024)
         val bootstrapClient = OkHttpClient.Builder().cache(appCache).build()
 
-        dohGoog = DnsOverHttps.Builder().client(bootstrapClient)
-            .url("https://dns.google/dns-query".toHttpUrl())
-            .bootstrapDnsHosts(InetAddress.getByName("8.8.4.4"), InetAddress.getByName("8.8.8.8"))
+        dohClient = DnsOverHttps.Builder().client(bootstrapClient)
+            .url("https://1.1.1.1/dns-query".toHttpUrl())
+            .bootstrapDnsHosts(InetAddress.getByName("1.1.1.1"))
             .build()
 
-        dohClient = OkHttpClient.Builder().dns(dohGoog).build()
+        okClient = OkHttpClient.Builder()
+            .dns(dohClient)
+            .connectTimeout(1, TimeUnit.MINUTES)
+            .readTimeout(30, TimeUnit.SECONDS)
+            .writeTimeout(15, TimeUnit.SECONDS)
+            .build()
 
     }
     override fun intercept(chain: Interceptor.Chain): Response {
-        val response = dohClient.newCall(request = chain.request()).execute()
+        val response = okClient.newCall(request = chain.request()).execute()
         return response
     }
 }
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