Add import statement

Author: czlucius

app/src/main/java/com/czlucius/scan/App.java

@@ -29,6 +29,7 @@
 import com.czlucius.scan.misc.monetization.AdStrategy2;
 
 import org.acra.ACRA;
+import org.acra.BuildConfig;
 import org.acra.config.Configuration;
 import org.acra.config.CoreConfigurationBuilder;
 import org.acra.config.MailSenderConfiguration;