Get CI working again

Before this change:
* We used to have the wrong build requirements in .travis.yml
* The Android linter crashed during CI

The Android linter crash is this problem:
https://github.com/JakeWharton/timber/issues/109

We work around it in this change by explicitly calling .toString() on a
parameter to a logging call.

As for the wrong requirements, this change simply updates them.

.travis.yml

@@ -9,7 +9,7 @@ android:
     - tools # https://github.com/travis-ci/travis-ci/issues/5049
     - android-23
     - platform-tools-23.1
-    - build-tools-23.0.2
+    - build-tools-23.0.3
     - extra-android-m2repository
     - extra-google-m2repository
   licenses:
@@ -28,4 +28,3 @@ script:
 after_success:
   - mv build/reports/coverage/googleplay/debug/report.xml build/reports/coverage/googleplay/debug/coverage.xml
   - bash <(curl -s https://codecov.io/bash)
-

src/main/java/com/todoroo/andlib/data/DatabaseDao.java

@@ -12,6 +12,8 @@ import com.todoroo.andlib.sql.Criterion;
 import com.todoroo.andlib.sql.Query;
 import com.todoroo.astrid.dao.Database;
 
+import org.tasks.BuildConfig;
+
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -219,7 +221,9 @@ public class DatabaseDao<TYPE extends AbstractModel> {
             if (result.get()) {
                 onModelUpdated(item);
                 item.markSaved();
-                Timber.d("%s %s", op, item);
+                if (BuildConfig.DEBUG) {
+                    Timber.d("%s %s", op, item.toString());
+                }
             }
         }
         return result.get();