Add null safety to host

Author: subsymbolic

app/src/main/java/com/duckduckgo/app/httpsupgrade/HttpsUpgrader.kt

@@ -53,11 +53,12 @@ class HttpsUpgraderImpl(
             return false
         }
 
+        val host = uri.host ?: return false
+
         waitForAnyReloadsToComplete()
 
-        val host = uri.host
         if (whitelistedDao.contains(host)) {
-            Timber.d("${host} is in whitelist and so not upgradable")
+            Timber.d("$host is in whitelist and so not upgradable")
             return false
         }
 
@@ -66,7 +67,7 @@ class HttpsUpgraderImpl(
             val initialTime = System.nanoTime()
             val shouldUpgrade = it.contains(host)
             val totalTime = System.nanoTime() - initialTime
-            Timber.d("${host} ${if (shouldUpgrade) "is" else "is not"} upgradable, lookup in ${totalTime / NANO_TO_MILLIS_DIVISOR}ms")
+            Timber.d("$host ${if (shouldUpgrade) "is" else "is not"} upgradable, lookup in ${totalTime / NANO_TO_MILLIS_DIVISOR}ms")
 
             return shouldUpgrade
         }