instrument: import public keys as public

OpenKeychain/src/androidTest/java/org/sufficientlysecure/keychain/TestHelpers.java

@@ -48,7 +48,7 @@ public class TestHelpers {
             if (ring.isSecret()) {
                 helper.saveSecretKeyRing(ring, new ProgressScaler());
             } else {
-                helper.saveSecretKeyRing(ring, new ProgressScaler());
+                helper.savePublicKeyRing(ring, new ProgressScaler());
             }
         }