Update bugsnag-android dependencies

Android Changelog
====

## 3.4.0 (2016-03-09)

### Enhancements

- Limit the number of stored errors
  [Duncan Hewett](https://github.com/duncanhewett)
  [#97](bugsnag/bugsnag-android#97)

### Bug Fixes

- Fix `ConcurrentModificationException` which could occur when saving
  breadcrumbs
  [Duncan Hewett](https://github.com/duncanhewett)
  [#98](bugsnag/bugsnag-android#98)

- Localize all numbers in error metrics
  [Delisa Mason](https://github.com/kattrali)
  [#100](bugsnag/bugsnag-android#100)

3.3.0 (2016-01-18)
-----

### Enhancements

- Change distribution method to be .aar only
  [Lars Grefer](https://github.com/larsgrefer)
  [#91](bugsnag/bugsnag-android#91)

- Skip sending empty device data values
  [Matthias Urhahn](https://github.com/d4rken)
  [#96](bugsnag/bugsnag-android#96)

- Remove the need for synthetic methods
  [Jake Wharton](https://github.com/JakeWharton)
  [#87](bugsnag/bugsnag-android#87)

3.2.7 (2015-12-10)
-----

### Enhancements

- Add additional check to ensure the cache of uploaded errors are deleted
  [#80](bugsnag/bugsnag-android#80)

### Bug Fixes

- Fix exception which occurs when `appContext.getResources()` is null
  [#78](bugsnag/bugsnag-android#78)

- Fix bug preventing `maxBreadcrumbs` from being set
  [David Wu](https://github.com/wuman)
  [#70](bugsnag/bugsnag-android#70)

3.2.6
-----
-   Add blocking API
-   Fix NPE issue
-   Concurrent adding to tabs
-   Thread Safe DateUtils#toISO8601