AudioService experiment field trial update.

Bug: 832666
Change-Id: I4dfafd0d6d9d4867dc4c7460644a7166ad5e6e8c
Reviewed-on: https://chromium-review.googlesource.com/1120502Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Commit-Queue: Olga Sharonova <olka@chromium.org>
Cr-Commit-Position: refs/heads/master@{#571765}

testing/variations/fieldtrial_testing_config.json

@@ -416,13 +416,16 @@
             ],
             "experiments": [
                 {
-                    "name": "AudioProcess",
+                    "name": "AudioProcess_v3",
                     "params": {
-                        "teardown_timeout_s": "300"
+                        "teardown_timeout_s": "900"
                     },
                     "enable_features": [
                         "AudioServiceAudioStreams",
                         "AudioServiceOutOfProcess"
+                    ],
+                    "disable_features": [
+                        "AudioServiceLaunchOnStartup"
                     ]
                 }
             ]