Ignore requests to stop services that don't exist on a platform.

Some platforms don't support certain services.  For example, parrot
does not have bluetooth and therefore no bluetoothd service.  Change
allows system call to upstart ( 'stop <service>' ) to fail gracefully
instead of causing an exception.

TEST=run power_Consumption on parrot

Change-Id: Iaf0e84dc41615aee5316c7e0fc59ea0ea7329182
Reviewed-on: https://gerrit.chromium.org/gerrit/51254
Reviewed-by: Sameer Nanda <snanda@chromium.org>
Reviewed-by: Mohammed Habibulla <moch@chromium.org>
Commit-Queue: Todd Broch <tbroch@chromium.org>
Tested-by: Todd Broch <tbroch@chromium.org>
(cherry picked from commit 3c89c0984d39e06922da1f29e96688aa2a2e177c)
Reviewed-on: https://gerrit.chromium.org/gerrit/51469
1 file changed