CRAS: cras_server_metrics - Use normal histogram for runtime

For the stream runtime and the fetch delay, the UMA should not be logged
as sparse histograms. Change to use normal histograms.

Change the name so that the type in the server will be changed
successfully.
Cras.{Input|Output}StreamRuntime -> Cras.StreamRuntime.{Input|Output}
Cras.StreamTimeoutMilliSeconds -> Cras.FetchDelayMilliSeconds

BUG=b:177185438
TEST=Verified the UMA is logged correcly in chrome://histograms

Change-Id: Id728f79c9b3fb0c0c77b399893a5773a1024023b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/adhd/+/2675352
Reviewed-by: Cheng-Yi Chiang <cychiang@chromium.org>
Tested-by: Yu-Hsuan Hsu <yuhsuan@chromium.org>
Commit-Queue: Yu-Hsuan Hsu <yuhsuan@chromium.org>
1 file changed