Removing browser launch from audio and video

For historical reasons audio and video workloads were launching the
browser as part of their setup. This is no longer necessary. Not only
that, since on recent devices the default Android browser is missing,
this causes problems with the workloads. This commit removes the browser
launch.

wlauto/workloads/audio/__init__.py

@@ -59,14 +59,6 @@ class Audio(Workload):
 
         self.device.push_file(self.audio_file, self.on_device_file, timeout=120)
 
-        # Open the browser with default page
-        self.device.execute('am start -n  com.android.browser/.BrowserActivity about:blank')
-        time.sleep(5)
-
-        # Stop the browser if already running and wait for it to stop
-        self.device.execute('am force-stop com.android.browser')
-        time.sleep(5)
-
         # Clear the logs
         self.device.clear_logcat()
 
@@ -88,8 +80,6 @@ class Audio(Workload):
         time.sleep(self.duration)
 
     def update_result(self, context):
-        # Stop the browser
-        self.device.execute('am force-stop com.android.browser')
         # Stop the audio
         self.device.execute('am force-stop com.android.music')
 

wlauto/workloads/video/__init__.py

@@ -109,10 +109,6 @@ class VideoWorkload(Workload):
         if self.force_dependency_push or not self.device.file_exists(on_device_video_file):
             self.logger.debug('Copying {} to device.'.format(self.host_video_file))
             self.device.push_file(self.host_video_file, on_device_video_file, timeout=120)
-        self.device.execute('am start -n  com.android.browser/.BrowserActivity about:blank')
-        time.sleep(5)
-        self.device.execute('am force-stop com.android.browser')
-        time.sleep(5)
         self.device.clear_logcat()
         command = 'am start -W -S -n com.android.gallery3d/.app.MovieActivity -d {}'.format(on_device_video_file)
         self.device.execute(command)