[Merge] lp:camera-app/staging into lp:camera-app

[Florian Boucault]

The proposal to merge lp:camera-app/staging into lp:camera-app has been updated.

Commit Message changed to:

Startup time improvements:
- Load view finder overlay synchronously thus avoiding a black screen.
- Faster and cached AdvancedCameraSettings.videoSupportedResolutions(). Saves around 1000ms on krillin.
- Cache StorageLocation::removableStorageLocation. Saves around 200ms on krillin.

For more details, see:
https://code.launchpad.net/~phablet-team/camera-app/staging/+merge/298329
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Your team Ubuntu Phablet Team is requested to review the proposed merge of lp:camera-app/staging into lp:camera-app.