Pass emulator id in run_on_as_app.py

Change-Id: I8c160e0f5a28d78645c17eefa015f2189b21eac3
diff --git a/tools/run_on_as_app.py b/tools/run_on_as_app.py
index 55c8857..2889d74 100755
--- a/tools/run_on_as_app.py
+++ b/tools/run_on_as_app.py
@@ -222,7 +222,7 @@
 def UninstallApkOnEmulator(app, config, options):
   app_id = config.get('app_id')
   process = subprocess.Popen(
-      ['adb', 'uninstall', app_id],
+      ['adb', '-s', emulator_id, 'uninstall', app_id],
       stdout=subprocess.PIPE, stderr=subprocess.PIPE)
   stdout, stderr = process.communicate()