Extras stored to describe capture device capabilities are used by replay

As noted [in this PR](https://github.com/google/gapid/pull/2097#issuecomment-408620292), there are a number of extras that are being stored into the capture to describe the **traced device** capabilities. These extras are then used to decide how to generate the **replay**.

This is all a bit backwards - we should no assumptions that the replay device is the same as the one used for tracing. If we need to dynamically generate replay logic based on the replay device capabilities, then we should be storing this information in the [`VulkanDriver` structure of the device](https://github.com/google/gapid/blob/master/core/os/device/device.proto#L214). By doing this, you'll get this information in the capture header as well as for the replay device.

[There are already examples of this for GLES](https://github.com/google/gapid/blob/master/core/os/device/device.proto#L205).