Fix Streaming for KeyFiles (#300)

Signed-off-by: d067928 <jakob.moeller@sap.com>

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/http/service/DistributionService.kt

@@ -2,6 +2,7 @@ package de.rki.coronawarnapp.http.service
 
 import okhttp3.ResponseBody
 import retrofit2.http.GET
+import retrofit2.http.Streaming
 import retrofit2.http.Url
 
 interface DistributionService {
@@ -12,6 +13,7 @@ interface DistributionService {
     @GET
     suspend fun getHourIndex(@Url url: String): List<String>
 
+    @Streaming
     @GET
     suspend fun getKeyFiles(@Url url: String): ResponseBody
 

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/util/security/VerificationKeys.kt

@@ -38,8 +38,8 @@ class VerificationKeys {
             .isEmpty()
             .also {
                 if (BuildConfig.DEBUG) {
-                    if (it) Log.d(TAG, "export is valid")
-                    else Log.d(TAG, "export is invalid")
+                    if (it) Log.d(TAG, "export is invalid")
+                    else Log.d(TAG, "export is valid")
                 }
             }
     }